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Gordon Dean Holman

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840: 1046: 3248: 3264: 3294: 92: 25: 594:, seen as a cusp at the top of flare magnetic loops. He has examined the impact of a return current that is expected to be co-spatial with the streaming energetic electrons responsible for the highest energy X-ray emission from flares and, with Meriem Alaoui Abdallaoui, continues to examine the impact of the return current on flare evolution. 562:
magnetic reconnection caused by a polarity reversal in the solar wind magnetic field impacting the comet.  The second event might have also been caused by a polarity reversal, but a high density and velocity compression region was present as well that might have caused or contributed to the event.  
416:) with a temperature near 100 million degrees, not more energetic non-thermal electrons.  Holman and collaborators showed how the population of non-thermal electrons responsible for the radio emission could also heat the plasma producing the X-rays, providing a connection between the two sources.  517:
The wavelength of microwave emission from active regions provides a measure of the magnetic field strength in hot, magnetically confined structures at coronal temperatures.  In the late 1980s and early 1990s, Holman and collaborators carried out the Coronal Magnetic Structures Observing Campaign
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was given the designation "Type II radio burst" in the early 1950s.  Holman and Pesses hypothesized that Type II emission is stimulated by electrons energized by shock drift acceleration.  They found the hypothesis to be sound and identified implications for the geometry of the shock wave
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through which the comet was traveling.  Brosius, Holman and collaborators examined two disconnection events that occurred during this period of time along with the properties of the solar wind measured by ICE.  They concluded that the first disconnection event was most likely front-side
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provide a view of hot gas and energetic particles in the Universe that could not otherwise be obtained.  Holman has specialized in the interpretation of these observed emissions to determine the origin and evolution of this hot gas and energetic particles.  He has been described as "not
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Senior Research Associateship at NASA's Goddard Space Flight Center.  He was hired into a federal civil service position at Goddard in 1985 in what is now the Laboratory for Solar Physics, where he remained until he retired in 2018.  In 1988 Holman spent roughly six months at
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Holman has collaborated on major studies of the partition of energy in solar eruptive events (large eruptions consisting of both a flare and a coronal mass ejection). Observational studies by him and his collaborators have helped establish that the primary site of energy release is
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are located.  Major solar flares and eruptions also originate in active regions.  (However, in 2015 Holman and collaborator Adi Foord found that a significant X-ray flare occurred outside any active region, in association with the eruption of a long,
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Multiple reviews of this and related research have been authored or coauthored by Holman. In 2016 he authored a review addressing future observations from space that would lead to substantial progress toward our understanding of solar activity.
197:.  He has authored or co-authored over one-hundred research papers for scientific journals as well as over one-hundred published abstracts of presentations at scientific meetings. They provide new information about solar flares and 404:.  In his PhD Thesis Holman explored the implications of models that explained both sources as arising from the same population of energetic electrons.  Subsequent observations in the mid-1970s indicated that the X-ray emission is 254: 1578: 526:(SMM) satellite as well as other relevant observations.  Magnetic field strengths up to 600 Gauss were deduced, while the presence of cooler plasma and higher Alfvén speeds than expected in the corona were also inferred.  213:(see Research section below).  He has also authored review articles, science magazine articles, book reviews, proposals, technical reports, referee reports, proposal reviews, and Web sites.  He is author of the April 2006 582:.  It was launched in early 2002 and was decommissioned in 2018.  Much of Holman's research focuses on analysis of the RHESSI X-ray data to deduce the origin and evolution of energetic electrons produced in solar flares. 574:(RHESSI).  The RHESSI satellite was an observatory designed to explore the basic physics of particle acceleration and explosive energy release in solar flares by obtaining high-resolution spectroscopic imaging of flares in 160:
from astronomical objects.  This radiation cannot be observed from Earth's surface, but is observed with instruments on satellites launched to orbits above Earth's atmosphere.  It is primarily emitted by high-energy
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of high-energy electrons partially mirrored at the bottom of a magnetic loop could be responsible for these spikes.  This mechanism is also likely to be responsible for bright radio flares from active stars such as the
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radiation were observed during the impulsive phase of some solar flares.  The high brightness of these spikes indicated that a coherent radiation process must be responsible.  Holman and colleagues showed that
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published his article "Solar Eruptive Events" in April 2012.  He is author of the book "The Scientific Method: Why science is a crucial process for human progress, not just another academic subject or belief"
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Holman, G. D.; Cheng, C.-C.; Gurman, J. B.; Haisch, B. M.; Poland, A. I.; Porter, J. G.; Saba, J. L. R.; Schmieder, B.; Strong, K. T. (1999). Strong, K. T.; Saba, J. L. R.; Haisch, B. M.; Schmelz, J. T. (eds.).
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and the corresponding sources of radio emission.  Holman has collaborated on observational studies examining the initiation of coronal mass ejections and the properties of Type II emission.
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and its evolution is understood to be the source of energy for this activity.  Therefore, it is important to know the strength and structure of active region magnetic fields.  
3355: 1614: 571: 186: 278:.  His PhD dissertation, obtained under the supervision of Dr. Wayne A. Christiansen, was titled "Models for X-Ray and Radio Emission from Clusters of Galaxies".   542:(also called gas or plasma tail) of the comet disconnects and moves away from the head.  There are several possible explanations for this phenomenon, one of which is 2209:"The Comet Giacobini-Zinner handbook : an observer's guide to the first comet to be explored by a spacecraft, February 14, 1985 / created by Donald K. Yeomans ..." 939: 265:, Germany, where he interned with a group studying the stimulated emission of trapped electrons from solid surfaces.  This led to a research note in the journal 608: 239: 1031: 553:
publication "The comet Giacobini-Zinner handbook. An observer's guide to the first comet to be explored by a spacecraft". The intercepting spacecraft was the
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Alfvén waves could keep the particles from being slowed to this speed, especially in the exceptionally hot plasma in the clusters of galaxies.  
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astronomy group.  He remained with this group at the University of Maryland for four years.  With Kundu he coedited the Proceedings of the
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for outstanding contributions to the scientific understanding of the processes of magnetic energy release and particle acceleration in solar flares.
298: 287: 3330: 1657: 1598: 557:(ICE). When Halley's comet made its appearance in 1986, ICE was nearby obtaining measurements of the thermal and magnetic properties of the 258: 294: 3335: 49: 431:
in the plasma.  This would restrict the size of the radio source.  Holman and collaborators showed that the damping of short-
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Holman obtained a Master of Science degree in physics in 1973 and Doctor of Philosophy degree in astrophysics in 1977, both from the
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Certificate certifying completion by Gordon D. Holman of NAS NRC Research Associate position at NASA's Goddard Space Flight Center.
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Holman started his career as a physics graduate student teaching observational laboratories for freshman astronomy students at the
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Solar Active Region Evolution: Comparing Models with Observations (Proceedings of the XIVth NSO/Sacramento Peak Summer Workshop)
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Brosius, J. W.; Holman, G. D.; Niedner, M. B.; Brandt, J. C.; Slavin, J. A.; Smith, E. J.; Zwickl, R. D.; Bame, S. J. (1987).
345: 2060:"Coronal Structures in Active Regions: Quantitative Results from Multi-Wavelength Observations and Comparisons with Models" 3325: 626: 356: 2712:
Su, Yang; Veronig, Astrid M.; Holman, Gordon D.; Dennis, Brian R.; Wang, Tongjiang; Temmer, Manuela; Gan, Waiqun (2013).
2144:"A global model of cometary tail disconnection events triggered by solar wind magnetic variations: MHD MODEL OF COMET DE" 615: 321: 2028: 941:
The Scientific Method: Why science is a crucial process for human progress, not just another academic subject or belief
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in Chapel Hill, NC.  He also assisted with lecture courses in astronomy, physics, and Physics and Society.  
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Savage, Sabrina L.; Holman, Gordon; Reeves, Katharine K.; Seaton, Daniel B.; McKenzie, David E.; Su, Yang (2012).
1253: 550: 1325:"X-ray and Radio Emission from Clusters of Galaxies: The Heating of Intracluster Gas by Relativistic Electrons" 945: 522:(VLA) radio telescope in New Mexico combined with X-ray observations from the Flat Crystal Spectrometer on the 247: 243: 1183: 2304:
Sui, Linhui; Holman, Gordon D.; Dennis, Brian R.; Krucker, Sam; Schwartz, Richard A.; Tolbert, Kim (2002).
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In the early 1970s extended sources of X-ray emission were detected in large clusters of galaxies with the
246:, Florida, in 1967, Holman obtained a Bachelor of Science degree in physics with a minor in mathematics at 3320: 3293: 3201: 3144: 3087: 3038: 2713: 2186:
The comet Giacobini-Zinner handbook. An observer's guide to the first comet to be explored by a spacecraft
1989: 1630:"Implications of the 1400 MHZ Flare Emission from AD Leo for the Emission Mechanism and Flare Environment" 622: 372: 2991: 2932: 2874:"Understanding Breaks in Flare X-Ray Spectra: Evaluation of a Cospatial Collisional Return-current Model" 2873: 2788: 2656: 2607: 2558: 1877: 1304:"The X-ray temperatures of eight clusters of galaxies and their relationship to other cluster properties" 911: 859: 587: 543: 523: 473: 267: 2858: 2241:"On the Cause of Plasma Tail Disconnection Events in Comet Halley During the ICE- Halley Radial Period" 783: 156:
in Greenbelt, Maryland.  His research mostly focused on obtaining an understanding of high-energy
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and summer interns.  He contributed to the NASA / UC Berkeley Lesson Series Exploring Magnetism.
3315: 3213: 3166: 3109: 3050: 3003: 2954: 2895: 2800: 2735: 2678: 2619: 2570: 2503: 2464: 2411: 2364: 2317: 2190: 2099: 2071: 2001: 1962: 1889: 1802: 1751: 1710: 1637: 1543: 1502: 1461: 1416: 1375: 1336: 1284: 1169: 1124: 1093: 1068: 1013: 982: 636: 485: 349: 310: 2844: 35: 3202:"Scientific considerations for future spectroscopic measurements from space of activity on the Sun" 1404: 1236: 864: 215: 2219: 3229: 3182: 3156: 3125: 3099: 3068: 3019: 2972: 2944: 2913: 2885: 2826: 2751: 2725: 2694: 2668: 2637: 2588: 2521: 2380: 2333: 2091: 1907: 1820: 1792: 1608: 1559: 1278: 1222: 1150: 1087: 1009: 767:
NASA Goddard Space Flight Center Scientific Colloquia, quote from introduction by Brian R. Dennis
507: 302: 2240: 2208: 2657:"Low-altitude Reconnection Inflow-Outflow Observations during a 2010 November 3 Solar Eruption" 1113:"Evidence for the Full Hard X-ray Spectral Signature of Nonuniform Ionization in a Solar Flare" 3088:"Implications of X-ray Observations for Electron Acceleration and Propagation in Solar Flares" 2059: 1950: 1878:"Direct Spatial Association of an X-Ray Flare with the Eruption of a Solar Quiescent Filament" 1698: 1653: 1594: 1490: 1363: 1324: 1142: 949: 825: 405: 389: 330: 317:(IAU) Symposium No, 107, "Unstable Current Systems and Plasma Instabilities in Astrophysics". 173:
which is observed from Earth's surface.  Consequently, these observations from space and
2933:"Role of Suprathermal Runaway Electrons Returning to the Acceleration Region in Solar Flares" 3221: 3174: 3117: 3058: 3011: 2962: 2903: 2816: 2808: 2743: 2686: 2627: 2578: 2511: 2472: 2427: 2419: 2372: 2325: 2215: 2163: 2155: 2040: 2009: 1970: 1897: 1810: 1759: 1755: 1718: 1645: 1636:. Astrophysics and Space Science Library. Vol. 116. Dordrecht: Reidel. pp. 35–37. 1586: 1551: 1510: 1469: 1424: 1420: 1383: 1344: 1132: 990: 899: 519: 413: 2789:"Understanding the Impact of Return-current Losses on the X-Ray Emission from Solar Flares" 1303: 1032:"Symposium – International Astronomical Union: Volume 107 – | Cambridge Core cambridge.org" 895: 3267:
NASA Group Achievement Award, awarded to the RHESSI Science and Data Analysis Team in 2013
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Citation to 2018 NASA Exceptional Scientific Achievement Medal awarded to Gordon D. Holman
2516: 2491: 1364:"The Heating of Gas in Clusters of Galaxies by Relativistic Electrons: Collective Effects" 924: 401: 174: 170: 2769: 546:
at the front of the comet where the tail magnetic field wraps around the nucleus.  
518:(CoMStOC).  This campaign obtained observations of multiple active regions with the 424: 3217: 3170: 3113: 3054: 3007: 2958: 2899: 2804: 2739: 2682: 2623: 2608:"Evidence for Magnetic Reconnection in Three Homologous Solar Flares Observed by RHESSI" 2574: 2507: 2468: 2415: 2368: 2352: 2321: 2194: 2184: 2103: 2075: 2005: 1966: 1893: 1806: 1714: 1641: 1547: 1506: 1465: 1428: 1379: 1340: 1288: 1128: 1097: 1072: 1062: 1017: 986: 743: 91: 511: 428: 202: 129: 1902: 1137: 1112: 716: 3309: 3233: 2976: 2917: 2830: 2812: 2755: 2690: 2592: 2525: 2337: 2306:"Modeling Images and Spectra of a Solar Flare Observed by RHESSI on 20 February 2002" 2142:
Jia, Ying-Dong; Combi, Michael R.; Hansen, Kenneth C.; Gombosi, Tamas I. (May 2007).
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The Many Faces of the Sun: A Summary of the Results from NASA's Solar Maximum Mission
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and beyond.  Radio emission has long been observed from these shock waves. This
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Chrysaphi, Nicolina; Kontar, Eduard P.; Holman, Gordon D.; Temmer, Manuela (2018).
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Alaoui, Meriem; Holman, Gordon D.; Allred, Joel C.; Eufrasio, Rafael T. (2021).
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Holman, Gordon D.; Sui, Linhui; Schwartz, Richard A.; Emslie, A. Gordon (2003).
1649: 1450:"Origin and transport of electrons in the halo radio source in the Coma cluster" 306: 297:.  In August 1977 he was awarded a two-year Postdoctoral Fellowship at the 194: 2967: 2908: 1815: 1780: 1579:"An Interpretation of Solar Flare Microwave Spikes as Gyrosynchrotron Masering" 255:
International Association for the Exchange of Students for Technical Experience
3178: 3121: 2329: 1629: 1237:"Officers and Committees of the Solar Physics Division of the AAS (2000–2010)" 558: 539: 477: 432: 393: 210: 1146: 845:
Harvard Smithsonian Astrophysical Observatory / NASA Astrophysics Data System
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article "The Mysterious Origins of Solar Flares" and principal author of the
2821: 2559:"Evidence for the Formation of a Large-Scale Current Sheet in a Solar Flare" 2143: 2027:
Brosius, Jeffrey W.; Holman, Gordon D.; Schmelz, Joan T. (15 October 1991).
1699:"Solar Type II Radio Emission and the Shock Drift Acceleration of Electrons" 1208: 994: 579: 461: 444: 420: 157: 3279: 1531: 2305: 1990:"Results from CoMStOC: The coronal magnetic structures observing campaign" 1010:"Models for X-ray and Radio Emission from Clusters of Galaxies – NASA/ADS" 970: 3225: 2476: 2432: 2423: 2168: 2159: 880: 162: 141: 118: 971:"Optically stimulated electron emission from LiF with thermal bleaching" 614:
As a member of the RHESSI Science and Data Analysis Team, he received a
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Modeling Solar Flare Hard X-ray Images and Spectra Observed with RHESSI
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In 1977 Holman was hired as a lecturer in the Astronomy Program at the
3063: 2747: 2044: 1491:"Particle Streaming: Is the Alfven Velocity the Ultimate Speed Limit?" 903: 419:
It had been argued that energetic charged particles streaming through
2263:"Interview with Brian Dennis and Gordon Holman: NASA's Sun-Earth Day" 1555: 1362:
Scott, J. S.; Holman, G. D.; Ionson, J. A.; Papadopoulos, K. (1980).
371:(COSPAR).  He was an elected member of the SPD Committee of the 2540:"Coronal Mass Ejections, Solar Flares, and the Sun-Earth Connection" 2029:"EOS Science News by AGU: Microwave polarization inversion observed" 340:
While at NASA Goddard, Holman supervised four PhD students (through
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Emslie, A. G.; Dennis, B. R.; Holman, G. D.; Hudson, H. S. (2005).
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Holman, G. D. (1994). Balasubramaniam, K. S.; Simon, G. W. (eds.).
1974: 1797: 1740:"Radio evidence for breakout reconnection in solar eruptive events" 1723: 1515: 1474: 1449: 1388: 1348: 784:"The Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI)" 3292: 3262: 3246: 3161: 3104: 2730: 2673: 1044: 575: 570:
Holman was Co-Investigator and member of the science team for the
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Aurass, H.; Holman, G.; Braune, S.; Mann, G.; Zlobec, P. (2013).
1283:. University of North Carolina at Chapel Hill PhD Dissertation. 149: 1781:"CME-driven Shock and Type II Solar Radio Burst Band Splitting" 2714:"Imaging coronal magnetic-field reconnection in a solar flare" 2492:"Global Energetics of Solar Flares and Coronal Mass Ejections" 860:"The Mysterious Origins of Solar Flares – Scientific American" 166: 18: 2859:"Early Career Scientist Spotlight – Meriem Alaoui Abdallaoui" 1280:
Models for X-ray and Radio Emission from Clusters of Galaxies
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Energetic particles and magnetic reconnection in solar flares
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Hot gas and energetic electrons in giant clusters of galaxies
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Su, Yang; Holman, Gordon D.; Dennis, Brian R. (2011-04-01).
3145:"Deducing Electron Properties from Hard X-ray Observations" 1862: 1405:"Cosmic-ray propagation in the Galaxy: collective effects" 1170:"Return currents in solar flares: Theory and observations" 468:
Radio emission from shock waves driven by solar eruptions
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Sui, Linhui; Holman, Gordon D; Dennis, Brian R. (2004).
841:"SAO/NASA Astrophysics Data System (ADS): Gordon Holman" 148:
at the National Aeronautics and Space Administration's (
763:"The Puzzle of Energy Release in Solar Eruptive Events" 621:
In 2007 he received the Popular Writing Award from the
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Gordon D. Holman 2014 Who's Who in the World Biography
2449:"Refinements to flare energy estimates: A followup to 1585:. Vol. 86. Dordrecht: Reidel. pp. 457–459. 1302:
Mitchell, R. J.; Ives, J. C.; Culhane, J. L. (1977).
2770:"A Flaring Loop at the Solar Limb as Seen by Yohkoh" 2119:"A Disconnection Event in the Tail of Comet Leonard" 896:"Solar Eruptive Events: Physics Today: Vol 65, No 4" 187:
Reuven Ramaty High Energy Solar Spectroscopic Imager
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Coronal magnetic field in active regions on the Sun
472:Eruptions of rapidly moving material from the Sun, 125: 114: 106: 98: 82: 3351:University of North Carolina at Chapel Hill alumni 1489:Holman, G.D.; Ionson, J. A.; Scott, J. S. (1979). 1209:"Member Directory | American Astronomical Society" 396:were also observed in some large clusters such as 189:(RHESSI), a space observatory designed to observe 1926:"Exploring Magnetism in Solar Flares – session 4" 1628:Holman, G. D.; Bookbinder, J.; Golub, L. (1985). 1577:Holman, G. D.; Eichler, D.; Kundu, M. R. (1980). 2400:"Energy partition in two solar flare/CME events" 1613:: CS1 maint: DOI inactive as of February 2024 ( 1532:"Millisecond microwave spikes in a solar flare" 717:"Fast Electrons, Bremsstrahlung, & Bowling" 3206:Journal of Geophysical Research: Space Physics 2457:Journal of Geophysical Research: Space Physics 2451:Energy partition in two solar flare/CME events 2404:Journal of Geophysical Research: Space Physics 2148:Journal of Geophysical Research: Space Physics 1951:"The microwave structure of hot coronal loops" 534:A particularly impressive feature observed in 1064:A Thermal/nonthermal Approach to Solar Flares 572:Ramaty High Energy Solar Spectroscopic Imager 178:just a theorist, he also looks at the data". 8: 3356:University of Maryland, College Park faculty 2183:Yeomans, D. K.; Brandt, J. C. (1985-01-01). 1632:. In Hjellming, R. M.; Gibson, D.M. (eds.). 969:Kaul, W.; Sutter, E.; Holman, G. D. (1971). 439:Maser emission from the Sun and active stars 253:In the summer of 1970 Holman was awarded an 2490:Aschwanden, Markus J.; et al. (2019). 1949:Holman, Gordon D.; Kundu, Mukul R. (1985). 1409:Annual Review of Astronomy and Astrophysics 423:thermal plasma could only propagate at the 276:University of North Carolina at Chapel Hill 223:(last revised in 2007).  The magazine 2872:Alaoui, Meriem; Holman, Gordon D. (2017). 1581:. In Kundu, M. R.; Gergely, T. E. (eds.). 881:"Solar Flare Theory Educational Web Pages" 90: 79: 3160: 3103: 3062: 2966: 2948: 2907: 2889: 2820: 2729: 2672: 2631: 2582: 2515: 2431: 2167: 1901: 1814: 1796: 1763: 1722: 1514: 1473: 1387: 1136: 169:. These electrons also emit radiation at 68:Learn how and when to remove this message 2774:Solar Flare Theory Educational Web Pages 2544:Solar Flare Theory Educational Web Pages 1843:Solar Flare Theory Educational Web Pages 1678:Solar Flare Theory Educational Web Pages 1092:. Greenbelt, MD: NASA/TM – 2005-212776. 805:Solar Flare Theory Educational Web Pages 744:"Why Study Solar Flares in Hard X-Rays?" 721:Solar Flare Theory Educational Web Pages 697:Solar Flare Theory Educational Web Pages 679:"Gordon D. Holman NASA Biography (2015)" 609:Exceptional Scientific Achievement Medal 497:The Sun's magnetic field is enhanced in 221:Solar Flare Theory Educational Web Pages 2557:Sui, Linhui; Holman, Gordon D. (2003). 748:Solar Flare Theory Educational Web Site 649: 549:In 1985 Holman contributed to the NASA 333:in Washington DC assisting with NASA's 299:Maryland Center for Fundamental Physics 288:Morehead Planetarium and Science Center 16:American astrophysicist, NASA scientist 3037:Miller, James A.; et al. (1997). 1988:Schmelz, J. T.; Holman, G. D. (1991). 1876:Holman, Gordon D.; Foord, Adi (2015). 1606: 920: 909: 320:In 1983 Holman was awarded a two-year 2496:Journal of Physics: Conference Series 1697:Holman, G. D.; Pesses, M. E. (1983). 673: 635:A short biography has been listed in 538:is the disconnection event, when the 181:Holman spent most of his career as a 7: 778: 776: 761:Holman, Gordon D. (April 25, 2014). 738: 736: 671: 669: 667: 665: 663: 661: 659: 657: 655: 653: 295:University of Maryland, College Park 259:Physikalisch-Techniche Bundesanstalt 3143:Kontar, E. P.; et al. (2011). 3086:Holman, G. D.; et al. (2011). 2398:Emslie, A. G.; et al. (2004). 1429:10.1146/annurev.aa.12.090174.000443 1184:"Exploring Magnetism lesson series" 894:Holman, Gordon D. (April 1, 2012). 858:Holman, Gordon D. (April 1, 2006). 530:Comet ion tail disconnection events 3341:Goddard Space Flight Center people 1323:Lea, S. M.; Holman, G. D. (1978). 1168:Alaoui Abdallaoui, Meriem (2018). 443:In 1978 and later rapid spikes of 346:The Catholic University of America 14: 2992:"Particle Acceleration in Flares" 2990:Benz, A. O.; et al. (1994). 1254:"Uhuru | Center for Astrophysics" 375:(SPD) of the AAS in 2005 – 2007. 2117:Phillips, Dr Tony (2021-12-28). 1061:Benka, Stephen G. (1991-01-01). 365:International Astronomical Union 337:proposal review process.   315:International Astronomical Union 23: 3346:Florida State University alumni 3043:Journal of Geophysical Research 2517:10.1088/1742-6596/1332/1/012002 2269:(Audio Podcast). 14 March 2011. 607:In 2018 Holman received NASA's 555:International Cometary Explorer 1: 3331:American Astronomical Society 627:American Astronomical Society 357:American Astronomical Society 2014:10.1016/0273-1177(91)90099-6 1591:10.1007/978-94-010-9722-2_65 616:NASA Group Achievement Award 427:because of interaction with 322:National Academy of Sciences 257:(IAESTE) traineeship at the 1903:10.1088/0004-637X/804/2/108 1765:10.1051/0004-6361/201321111 1650:10.1007/978-94-009-5420-5_3 1138:10.1088/0004-637X/731/2/106 369:Committee on Space Research 185:on the Science Team of the 154:Goddard Space Flight Center 43:. The specific problem is: 3372: 3336:American Geophysical Union 3280:"SPD Popular Media Awards" 3200:Holman, Gordon D. (2016). 2845:"Meriem Alaoui Abdallaoui" 2813:10.1088/0004-637X/745/1/52 2787:Holman, Gordon D. (2012). 2691:10.1088/0004-637X/754/1/13 2245:Astronomy and Astrophysics 1994:Advances in Space Research 1744:Astronomy and Astrophysics 1277:Holman, Gordon D. (1977). 1008:Holman, Gordon D. (1977). 361:American Geophysical Union 355:Holman is a member of the 301:.  He was hired as a 39:to meet Knowledge (XXG)'s 3179:10.1007/s11214-011-9804-x 3122:10.1007/s11214-010-9680-9 2937:The Astrophysical Journal 2878:The Astrophysical Journal 2793:The Astrophysical Journal 2661:The Astrophysical Journal 2612:The Astrophysical Journal 2563:The Astrophysical Journal 2357:The Astrophysical Journal 1955:The Astrophysical Journal 1882:The Astrophysical Journal 1785:The Astrophysical Journal 1703:The Astrophysical Journal 1495:The Astrophysical Journal 1454:The Astrophysical Journal 1368:The Astrophysical Journal 1329:The Astrophysical Journal 1117:The Astrophysical Journal 551:Jet Propulsion Laboratory 326:National Research Council 89: 2968:10.3847/1538-4357/ac0820 2909:10.3847/1538-4357/aa98de 2033:Eos: Science News by AGU 1816:10.3847/1538-4357/aae9e5 1583:Radio Physics of the Sun 1223:"Gordon D. Holman | IAU" 946:Kindle Direct Publishing 801:"What is a Solar Flare?" 629:for his 2006 article in 348:) and mentored numerous 248:Florida State University 3212:(12): 11, 667–11, 697. 2330:10.1023/A:1022417832283 2098:. Springer-Verlag: 41. 1756:2013A&A...555A..40A 1593:(inactive 2024-02-25). 1421:1974ARA&A..12...71W 1403:Wentzel, D. G. (1974). 995:10.1002/pssa.2210040235 975:Physica Status Solidi A 938:Holman, Gordon (2023). 693:"What are Hard X-Rays?" 3298: 3268: 3252: 2453:by A. G. Emslie et al" 2285:hesperia.gsfc.nasa.gov 1674:"Sun-Earth Connection" 1050: 919:Cite journal requires 623:Solar Physics Division 474:coronal mass ejections 394:Extended radio sources 373:Solar Physics Division 238:After graduating from 3296: 3266: 3250: 3149:Space Science Reviews 3092:Space Science Reviews 1977:– via NASA ADS. 1448:Jaffe, W. J. (1977). 1048: 588:magnetic reconnection 544:magnetic reconnection 524:Solar Maximum Mission 268:Physica Status Solidi 240:Northeast High School 45:images as references. 3326:NASA astrophysicists 3226:10.1002/2016JA022651 2477:10.1029/2005JA011305 2424:10.1029/2004JA010571 2160:10.1029/2006JA012175 1930:cse.ssl.berkeley.edu 1530:Slottje, C. (1978). 1188:cse.ssl.berkeley.edu 1086:Sui, Linhui (2005). 631:Scientific American. 486:solar radio emission 350:Postdoctoral Fellows 207:disconnection events 203:clusters of galaxies 50:improve this article 3218:2016JGRA..12111667H 3171:2011SSRv..159..301K 3114:2011SSRv..159..107H 3055:1997JGR...10214631M 3049:(A7): 14631–14660. 3008:1994SoPh..153...33B 2959:2021ApJ...917...74A 2900:2017ApJ...851...78A 2805:2012ApJ...745...52H 2740:2013NatPh...9..489S 2683:2012ApJ...754...13S 2624:2004ApJ...612..546S 2575:2003ApJ...596L.251S 2508:2019JPhCS1332a2002A 2469:2005JGRA..11011103E 2416:2004JGRA..10910104E 2369:2003ApJ...595L..97H 2322:2002SoPh..210..245S 2220:2027/uva.x004195091 2195:1985cgha.book.....Y 2104:1999mfs..conf...41H 2076:1994ASPC...68..356H 2006:1991AdSpR..11a.109S 1967:1985ApJ...292..291H 1894:2015ApJ...804..108H 1807:2018ApJ...868...79C 1715:1983ApJ...267..837H 1642:1985ASSL..116...35H 1548:1978Natur.275..520S 1507:1979ApJ...228..576H 1466:1977ApJ...212....1J 1380:1980ApJ...239..769S 1341:1978ApJ...222...29L 1289:1977PhDT.........4H 1258:www.cfa.harvard.edu 1129:2011ApJ...731..106S 1098:2004PhDT........32S 1073:1991PhDT........12B 1018:1977PhDT.........4H 987:1971PSSAR...4..101K 865:Scientific American 216:Scientific American 3299: 3269: 3253: 3016:10.1007/BF00712491 1051: 508:quiescent filament 303:Research associate 138:Gordon Dean Holman 84:Gordon Dean Holman 3064:10.1029/97JA00976 2748:10.1038/nphys2675 2281:"RHESSI Web Site" 2045:10.1029/90EO00328 1659:978-94-010-8892-3 1600:978-90-277-1121-2 1542:(5680): 520–521. 904:10.1063/PT.3.1520 637:Marquis Who's Who 602:Awards and honors 406:thermal radiation 392:satellite.  331:NASA Headquarters 309:to work with his 171:radio frequencies 165:interacting with 135: 134: 78: 77: 70: 41:quality standards 32:This article may 3363: 3300: 3290: 3284: 3283: 3276: 3270: 3260: 3254: 3244: 3238: 3237: 3197: 3191: 3190: 3164: 3155:(1–4): 301–355. 3140: 3134: 3133: 3107: 3098:(1–4): 107–166. 3083: 3077: 3076: 3066: 3034: 3028: 3027: 2987: 2981: 2980: 2970: 2952: 2928: 2922: 2921: 2911: 2893: 2869: 2863: 2862: 2855: 2849: 2848: 2841: 2835: 2834: 2824: 2822:2060/20120008262 2784: 2778: 2777: 2766: 2760: 2759: 2733: 2709: 2703: 2702: 2676: 2652: 2646: 2645: 2635: 2603: 2597: 2596: 2586: 2569:(2): L251–L254. 2554: 2548: 2547: 2536: 2530: 2529: 2519: 2487: 2481: 2480: 2444: 2438: 2437: 2435: 2395: 2389: 2388: 2348: 2342: 2341: 2301: 2295: 2294: 2292: 2291: 2277: 2271: 2270: 2259: 2253: 2252: 2236: 2230: 2229: 2227: 2226: 2205: 2199: 2198: 2180: 2174: 2173: 2171: 2139: 2133: 2132: 2130: 2129: 2123:Spaceweather.com 2114: 2108: 2107: 2092:"Active Regions" 2086: 2080: 2079: 2055: 2049: 2048: 2024: 2018: 2017: 1985: 1979: 1978: 1946: 1940: 1939: 1937: 1936: 1922: 1916: 1915: 1905: 1873: 1867: 1866: 1859: 1853: 1852: 1850: 1849: 1835: 1829: 1828: 1818: 1800: 1776: 1770: 1769: 1767: 1735: 1729: 1728: 1726: 1694: 1688: 1687: 1685: 1684: 1670: 1664: 1663: 1625: 1619: 1618: 1612: 1604: 1574: 1568: 1567: 1556:10.1038/275520a0 1527: 1521: 1520: 1518: 1486: 1480: 1479: 1477: 1445: 1439: 1438: 1436: 1435: 1400: 1394: 1393: 1391: 1359: 1353: 1352: 1320: 1314: 1313: 1311: 1310: 1299: 1293: 1292: 1274: 1268: 1267: 1265: 1264: 1250: 1244: 1243: 1241: 1233: 1227: 1226: 1219: 1213: 1212: 1207:Holman, Gordon. 1204: 1198: 1197: 1195: 1194: 1180: 1174: 1173: 1165: 1159: 1158: 1140: 1108: 1102: 1101: 1083: 1077: 1076: 1058: 1052: 1042: 1036: 1035: 1028: 1022: 1021: 1005: 999: 998: 981:(2): K101–K104. 966: 960: 959: 935: 929: 928: 922: 917: 915: 907: 891: 885: 884: 879:Holman, Gordon. 876: 870: 869: 855: 849: 848: 839:Holman, Gordon. 836: 830: 829: 824:Holman, Gordon. 821: 815: 814: 812: 811: 797: 791: 790: 788: 780: 771: 770: 758: 752: 751: 740: 731: 730: 728: 727: 713: 707: 706: 704: 703: 689: 683: 682: 675: 520:Very Large Array 510:.) The enhanced 452:emission from a 175:radio telescopes 94: 80: 73: 66: 62: 59: 53: 27: 26: 19: 3371: 3370: 3366: 3365: 3364: 3362: 3361: 3360: 3306: 3305: 3304: 3303: 3291: 3287: 3278: 3277: 3273: 3261: 3257: 3245: 3241: 3199: 3198: 3194: 3142: 3141: 3137: 3085: 3084: 3080: 3036: 3035: 3031: 2989: 2988: 2984: 2930: 2929: 2925: 2871: 2870: 2866: 2857: 2856: 2852: 2843: 2842: 2838: 2786: 2785: 2781: 2768: 2767: 2763: 2711: 2710: 2706: 2654: 2653: 2649: 2605: 2604: 2600: 2556: 2555: 2551: 2538: 2537: 2533: 2489: 2488: 2484: 2463:(A11): A11103. 2446: 2445: 2441: 2410:(A10): A10104. 2397: 2396: 2392: 2363:(2): L97–L101. 2350: 2349: 2345: 2303: 2302: 2298: 2289: 2287: 2279: 2278: 2274: 2261: 2260: 2256: 2238: 2237: 2233: 2224: 2222: 2207: 2206: 2202: 2182: 2181: 2177: 2141: 2140: 2136: 2127: 2125: 2116: 2115: 2111: 2088: 2087: 2083: 2057: 2056: 2052: 2039:(42): 449–454. 2026: 2025: 2021: 1987: 1986: 1982: 1948: 1947: 1943: 1934: 1932: 1924: 1923: 1919: 1875: 1874: 1870: 1861: 1860: 1856: 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54: 47: 28: 24: 17: 12: 11: 5: 3369: 3367: 3359: 3358: 3353: 3348: 3343: 3338: 3333: 3328: 3323: 3318: 3308: 3307: 3302: 3301: 3285: 3271: 3255: 3239: 3192: 3135: 3078: 3029: 3002:(1–2): 33–53. 2982: 2923: 2864: 2850: 2836: 2779: 2761: 2724:(8): 489–493. 2718:Nature Physics 2704: 2647: 2633:10.1086/422515 2618:(1): 546–556. 2598: 2584:10.1086/379343 2549: 2531: 2482: 2439: 2390: 2377:10.1086/378488 2343: 2316:(1): 245–259. 2296: 2272: 2254: 2231: 2200: 2175: 2134: 2109: 2081: 2050: 2019: 2000:(1): 109–116. 1980: 1975:10.1086/163159 1941: 1917: 1868: 1854: 1839:"Solar Flares" 1830: 1771: 1730: 1724:10.1086/160918 1689: 1665: 1658: 1620: 1599: 1569: 1522: 1516:10.1086/156881 1481: 1475:10.1086/155011 1440: 1395: 1389:10.1086/158162 1354: 1349:10.1086/156118 1315: 1294: 1269: 1245: 1228: 1214: 1199: 1175: 1160: 1103: 1078: 1053: 1037: 1023: 1000: 961: 955:979-8854425674 954: 930: 921:|journal= 886: 871: 850: 831: 826:"ResearchGate" 816: 792: 772: 753: 732: 708: 684: 648: 647: 645: 642: 641: 640: 633: 619: 612: 603: 600: 567: 564: 531: 528: 512:magnetic field 499:active regions 494: 491: 469: 466: 440: 437: 385: 382: 380: 377: 283: 280: 235: 232: 199:active regions 193:emission from 146:astrophysicist 133: 132: 130:Astrophysicist 127: 123: 122: 116: 112: 111: 108: 104: 103: 100: 96: 95: 87: 86: 83: 76: 75: 31: 29: 22: 15: 13: 10: 9: 6: 4: 3: 2: 3368: 3357: 3354: 3352: 3349: 3347: 3344: 3342: 3339: 3337: 3334: 3332: 3329: 3327: 3324: 3322: 3321:Living people 3319: 3317: 3314: 3313: 3311: 3295: 3289: 3286: 3281: 3275: 3272: 3265: 3259: 3256: 3249: 3243: 3240: 3235: 3231: 3227: 3223: 3219: 3215: 3211: 3207: 3203: 3196: 3193: 3188: 3184: 3180: 3176: 3172: 3168: 3163: 3158: 3154: 3150: 3146: 3139: 3136: 3131: 3127: 3123: 3119: 3115: 3111: 3106: 3101: 3097: 3093: 3089: 3082: 3079: 3074: 3070: 3065: 3060: 3056: 3052: 3048: 3044: 3040: 3033: 3030: 3025: 3021: 3017: 3013: 3009: 3005: 3001: 2997: 2996:Solar Physics 2993: 2986: 2983: 2978: 2974: 2969: 2964: 2960: 2956: 2951: 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Retrieved 696: 687: 630: 596: 584: 569: 548: 533: 516: 496: 482:solar corona 471: 459:M-dwarf star 454:distribution 442: 429:Alfvén waves 425:Alfvén speed 418: 387: 354: 339: 319: 292: 285: 273: 266: 263:Braunschweig 252: 237: 224: 220: 214: 195:solar flares 180: 137: 136: 64: 55: 48:Please help 44: 33: 3316:1949 births 2267:Archive.org 2154:(A5): n/a. 1961:: 291–296. 1863:"Adi Foord" 1634:Radio Stars 478:shock waves 311:solar radio 307:Mukul Kundu 305:in 1979 by 211:comet tails 201:as well as 107:Nationality 58:August 2023 52:if you can. 3310:Categories 2950:2103.13999 2891:1706.03897 2290:2023-04-15 2225:2023-08-15 2212:HathiTrust 2128:2023-04-16 1935:2023-04-16 1888:(2): 108. 1848:2023-04-14 1798:1810.08026 1683:2023-04-14 1434:2023-04-14 1309:2023-04-14 1263:2023-03-07 1193:2023-04-14 1123:(2): 106. 1067:(Thesis). 810:2023-04-17 726:2023-04-17 702:2023-04-17 644:References 580:gamma rays 559:solar wind 433:wavelength 421:magnetized 408:from hot, 126:Occupation 3234:126213071 3162:1110.1755 3105:1109.6496 2977:232352553 2943:(2): 74. 2918:126138492 2884:(2): 78. 2831:120586153 2799:(1): 52. 2756:119226120 2731:1307.4527 2674:1111.1945 2667:(1): 13. 2593:120173304 2526:209934624 2338:117196829 1912:124233139 1791:(2): 79. 1609:cite book 1155:120731036 1147:0004-637X 445:microwave 234:Education 163:electrons 158:radiation 144:research 115:Education 3187:55797275 3130:52242510 3073:36824157 3024:16744095 2699:54750353 2642:53982160 2385:56240913 1825:53395062 769:(Video). 618:in 2013. 540:ion tail 503:sunspots 501:, where 476:, drive 464:.  379:Research 142:emeritus 119:Emeritus 110:American 34:require 3214:Bibcode 3167:Bibcode 3110:Bibcode 3051:Bibcode 3004:Bibcode 2955:Bibcode 2896:Bibcode 2801:Bibcode 2736:Bibcode 2679:Bibcode 2620:Bibcode 2571:Bibcode 2504:Bibcode 2465:Bibcode 2412:Bibcode 2365:Bibcode 2318:Bibcode 2191:Bibcode 2100:Bibcode 2072:Bibcode 2070:: 356. 2002:Bibcode 1963:Bibcode 1890:Bibcode 1803:Bibcode 1752:Bibcode 1750:: A40. 1711:Bibcode 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