322:, was measured directly, using CHARA. This was achieved by using the observed angular diameter of the star that the planet orbited, and the already known distance of the star from Earth, to get the diameter of the star. With this they could calculate the diameter of the exoplanet when comparing its size to the star when it passed in front of it. This was the first time the diameter of an exoplanet was directly measured, and returned a value slightly different than that obtained from indirect, more conventional methods.
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283:(NSF), in 1985 planning for the array began. Construction for the array started on July 13, 1996, and with $ 6.3 million awarded to GSU by the NSF, and the same amount matched by GSU, going towards the effort. In July 1998, GSU was awarded another $ 1.5 million by W.M. Keck Foundation, which allowed for a sixth telescope to be added to the previously planned five. With a final gift of $ 574,000 from
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Anugu, Narsireddy; Baron, Fabien; Gies, Douglas R.; Lanthermann, Cyprien; Schaefer, Gail H.; Shepard, Katherine A.; Brummelaar, Theo ten; Monnier, John D.; Kraus, Stefan; Le
Bouquin, Jean-Baptiste; Davies, Claire L.; Ennis, Jacob; Gardner, Tyler; Labdon, Aaron; Roettenbacher, Rachael M.; Setterholm,
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CHARA's six telescopes each have a one-meter diameter mirror to reflect light. They are spread across Mount Wilson to increase the angular resolution of the array. Each of the six telescopes provides a different image, to combine it into one image the light from each telescope is transported through
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After another five years of construction, the CHARA array was completed in 2003. In April of the same year, CHARA was awarded a 3-year grant to support scientific programs at the center, which was renewed in 2006. In 2013 another grant from the NSF worth 3.6 million was given to the center.
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Baron, F.; Monnier, J. D.; Pedretti, E.; Zhao, M.; Schaefer, G.; Parks, R.; Che, X.; Thureau, N.; ten
Brummelaar, T. A.; McAlister, H. A.; Ridgway, S. T. (June 2012). "Imaging the Algol Triple System in the H Band with the CHARA Interferometer".
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Zhao, M.; Gies, D.; Monnier, J. D.; Thureau, N.; Pedretti, E.; Baron, F.; Merand, A.; ten
Brummelaar, T.; McAlister, H.; Ridgway, S. T.; Turner, N. (September 2008). "First Resolved Images of the Eclipsing and Interacting Binary β Lyrae".
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CHARA holds annual science meetings where recent advancements in science and technologies relevant to the array are discussed. The center also gives access to the array to the astronomical community using the
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622:"'Starspot' Images that Give Insight into Early Sun Captured by University's CHARA Telescope Array - News Hub -"
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vacuum tubes and fed into a single beam, where they are matched up to within one micron. This process is called
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Observatories and
Telescopes of Modern Times: Ground-Based Optical and Radio Astronomy Facilities since 1945
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peer review system for around 50 nights per year. They also have periodic community workshops.
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is further from the center of the star, it will appear cooler than the poles, an effect called
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Observatories throughout the world have come to CHARA to test beam combining technology.
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to measure the flattened shape of these rapidly rotating stars. Because the
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In 2022, the array was used to observe the disc of the hypergiant star
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Benjamin R.; Vollmann, Wolfgang; Sigismondi, Costantino (2023).
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In 1984 CHARA was founded, and with financial support from the
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Optical interferometer, located on Mount Wilson, California
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In 2013 CHARA was used to capture images showing the
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eclipsing binary, using images from the CHARA array
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647:"Seeing Stars | DiscoverMagazine.com"
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398:during its ongoing dimming event.
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570:Leverington, David (2016-11-24).
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673:Astrophysical Journal Letters
598:"CHARA measures an exoplanet"
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252:astronomical interferometer
133:astronomical interferometer
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859:The Astronomical Journal
805:"CHARA - Rapid Rotators"
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256:Georgia State University
208:Related media on Commons
115:Georgia State University
191:Location of CHARA array
64:, Pacific States Region
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306:Animation showing the
240:optical interferometer
90:34.22469°N 118.05712°W
45:Alternative names
735:Astrophysical Journal
387:and measure the disk
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129:Telescope style
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18:CHARA interferometer
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757:2012ApJ...752...20B
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381:circumstellar disks
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829:"CHARA - Be Stars"
523:"History of CHARA"
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651:Discover Magazine
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111:Organization
551:EurekAlert!
475:Nature News
320:HD 189733 b
298:Discoveries
93: /
81:118°03′26″W
69:Coordinates
58:Location(s)
31:CHARA array
872:2307.04926
838:2020-01-24
814:2020-01-24
679:(2): L95.
656:2017-10-26
632:2017-10-26
607:2017-10-26
556:2017-10-26
532:2017-10-26
455:2017-10-26
432:References
389:precession
354:Rasalhague
342:Beta Lyrae
340:, such as
308:Beta Lyrae
248:telescopes
78:34°13′29″N
62:California
899:259766495
865:(2): 78.
783:0004-637X
748:1205.0754
741:(1): 20.
711:0004-637X
686:0808.0932
396:RW Cephei
362:Alderamin
327:starspots
316:exoplanet
913:Category
791:11110989
719:17510817
626:News Hub
505:20376117
415:See also
385:Be-stars
877:Bibcode
753:Bibcode
691:Bibcode
483:Bibcode
446:"About"
383:around
370:equator
350:Regulus
275:History
258:(GSU).
147:Website
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402:Events
358:Altair
238:is an
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154:.chara
135:
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895:S2CID
867:arXiv
787:S2CID
743:arXiv
715:S2CID
681:arXiv
346:Algol
236:array
228:CHARA
215:[
779:ISSN
707:ISSN
578:ISBN
501:PMID
364:and
344:and
226:The
158:.edu
156:.gsu
885:doi
863:166
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