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An international research group, led by
Stefanie Komossa, calculated the mass of the primary black hole. "The results show that an exceptionally massive black hole exceeding 10 billion solar masses is no longer needed...the results favor models with a smaller mass of 100 million solar masses for the
421:
Laine, S.; Dey, L.; Valtonen, M.; Gopakumar, A.; Zola, S.; Komossa, S.; Kidger, M.; Pihajoki, P.; Gómez, J.L.; Caton, D.; Ciprini, S.; Drozdz, M.; Gazeas, K.; Godunova, V.; Haque, S.; Hildebrandt, F.; Hudec, R.; Jermak, H.; Kong, A.K.H.; Lehto, H.; Liakos, A.; Matsumoto, K.; Mugrauer, M.; Pursimo,
188:
from Earth that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891. Seen on photographic plates since at least 1887, it was first detected at radio wavelengths during the course of the
222:
226:
225:
221:
220:
227:
224:
210:
and the secondary black hole around 150 million solar masses. More recent models estimate that the central supermassive black hole has a mass of 100 million solar masses, much less than previous estimations. This would make its
205:
Given the variability in the SMBHB's bursts and properties, multiple models have been proposed to account for these flashes. The initial model estimates the mass of the primary black hole to be approximately 18.35 billion
539:
Fish, Vincent; Akiyama, Kazunori; Bouman, Katherine; Chael, Andrew; Johnson, Michael; Doeleman, Sheperd; Blackburn, Lindy; Wardle, John; Freeman, William; the Event
Horizon Telescope Collaboration (2016-10-27).
801:
Dey, L.; Gopakumar, A.; Valtonen, M.; Zola, S.; Susobhanan, A.; Hudec, R.; Pihajoki, P.; Pursimo, T.; Berdyugin, A.; Piirola, V.; Ciprini, S.; Nilsson, K.; Jermak, H.; Kidger, M.; Komossa, S. (2019).
235:
259:
The optical light curve shows that OJ 287 has a periodic variation of 11–12 years with a narrow double peak at maximum brightness. This kind of variation suggests that it is a
223:
197:
binary (SMBHB). The intrinsic brightness of the flashes corresponds to over a trillion times the Sun's luminosity, greater than the entire Milky Way galaxy's light output.
987:
376:
980:
907:
925:
1977:
957:
28:
745:
286:. The perinigricon and aponigricon of its orbit are about 3,250 and 17,500 AU. In recent models, the mass of the secondary
1982:
1866:
973:
247:
algorithm and another algorithm by a group from Boston university. OJ287 is a target candidate of the Event
Horizon Telescope,
398:
290:
has been estimated to be approximately 125 million solar masses, although this has been debated through multiple studies.
105:
1877:
1967:
274:
A secondary black hole orbits the larger one with an observed orbital period of approximately 12 years and a calculated
1007:
599:
Shi, Weizhao; Liu, Xiang; Song, Huagang (2007). "A new model for the periodic outbursts of the BL Lac object OJ287".
297:
In order to reproduce all the known outbursts, the rotation of the primary black hole is calculated to be 38% of the
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1449:
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1012:
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287:
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of approximately 0.65. The maximum brightness is obtained when the minor component moves through the
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and it is expected to merge with the central black hole within approximately 10,000 years.
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69:
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776:
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691:; et al. (February 2010). "Measuring the Spin of the Primary Black Hole in OJ287".
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542:"Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope"
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803:"The Unique Blazar OJ 287 and Its Massive Binary Black Hole Central Engine"
965:
424:"Spitzer Observations of the Predicted Eddington Flare from Blazar OJ 287"
1805:
1785:
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231:
Black Hole Disk Flares In Galaxy OJ 287 (1:22; animation; 28 April 2020)
1790:
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866:
644:"The 2005 November Outburst in OJ 287 and the Binary Black Hole Model"
1780:
1775:
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1707:
1561:
1551:
1487:
935:
371:
263:. The double-burst variability is thought to result from the smaller
248:
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115:
488:"Spitzer Telescope Reveals the Precise Timing of a Black Hole Dance"
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819:
785:
760:
668:
643:
558:
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33:
Comparisons of large and small black holes in galaxy OJ 287 to the
948:
Spitzer
Telescope Reveals the Precise Timing of a Black Hole Dance
759:
Valtonen, M. J.; Lehto, H. J.; Sillanpaa, A.; et al. (2006).
705:
283:
234:
217:
48:
642:
Valtonen, M. J.; Nilsson, K.; Sillanpää, A.; et al. (2006).
1022:
240:
969:
422:
T.; Reichart, D.E.; Simon, A.; Siwak, M.; Sonbas, E. (2020).
761:"Predicting the Next Outbursts of OJ 287 in 2006–2010"
308:
The companion's orbit is decaying via the emission of
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1832:
1763:
1715:
1706:
1679:
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Refining the OJ 287 2022 impact flare arrival epoch
150:
136:
122:
104:
94:
82:
68:
56:
41:
21:
271:of the larger black hole twice in every 12 years.
958:OJ 287: A new BH mass estimate of the secondary
981:
746:"Biggest black hole in the cosmos discovered"
377:Centre de données astronomiques de Strasbourg
239:Interferometric observations of OJ287 by the
8:
482:
480:
416:
414:
412:
156:EGO 0851+202, 3EG J0853+1941, RGB J0854+201
1829:
1712:
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494:. Jet Propulsion Laboratory. 28 April 2020
27:
836:
818:
784:
704:
667:
575:
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16:BL Lac object in the constellation Cancer
141:
1882:
399:"Black Hole Binary En Route to Merger?"
397:Camille M. Carlisle (13 January 2015).
321:
89:+20° 06′ 31″
516:"Weighing OJ 287 and the project MOMO"
18:
337:
335:
333:
331:
329:
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7:
908:18 Billions of Suns Support Einstein
510:
508:
14:
942:A Supermassive Black Hole Pairing
282:of the supermassive component at
1945:
1933:
1921:
1909:
1897:
1885:
1862:
1861:
748:. NewScientist.com news service.
744:Shiga, David (10 January 2008).
347:NASA/IPAC Extragalactic Database
343:"NED results for object OJ +287"
918:Historical lightcurve of OJ 287
601:Astrophysics and Space Science
261:binary supermassive black hole
1:
1008:Cancer in Chinese astronomy
723:10.1088/0004-637X/709/2/725
1999:
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1828:
1675:
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765:The Astrophysical Journal
693:The Astrophysical Journal
648:The Astrophysical Journal
621:10.1007/s10509-007-9413-z
431:The Astrophysical Journal
160:
155:
26:
1978:Supermassive black holes
936:OJ 287 2005-2008 Project
462:10.3847/2041-8213/ab79a4
299:maximum allowed rotation
1013:List of stars in Cancer
997:Constellation of Cancer
838:10.3390/universe5050108
613:2007Ap&SS.310...59S
577:10.3390/galaxies4040054
310:gravitational radiation
288:supermassive black hole
195:supermassive black hole
1983:Cancer (constellation)
912:Calar Alto Observatory
256:
232:
1055:δ (Asellus Australis)
520:www.mpifr-bonn.mpg.de
294:primary black hole".
267:punching through the
238:
230:
1050:γ (Asellus Borealis)
938:(Tuorla Observatory)
215:about 1.97 AU.
213:Schwarzschild radius
1968:BL Lacertae objects
1847:Musket Ball Cluster
1542:GJ 3470 (Kaewkosin)
903:Articles and images
829:2019Univ....5..108D
777:2006ApJ...646...36V
715:2010ApJ...709..725V
660:2006ApJ...643L...9V
568:2016Galax...4...54F
453:2020ApJ...894L...1L
403:Sky & Telescope
928:2006-09-25 at the
257:
243:resolved with the
233:
151:Other designations
138:Apparent magnitude
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944:(Centauri Dreams)
683:Valtonen, M. J.;
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52:
42:Observation data
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1689:Beehive Cluster
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303:Kerr black hole
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201:Characteristics
191:Ohio Sky Survey
167:List of quasars
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70:Right ascension
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923:Object: OJ 287
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858:External links
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786:10.1086/504884
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699:(1): 725–732.
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669:10.1086/505039
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607:(1–2): 59–63.
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280:accretion disk
269:accretion disc
255:by it in 2017.
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179:BL Lac object
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771:(1): 36–48.
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523:. Retrieved
519:
496:. Retrieved
492:JPL.NASA.gov
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434:
430:
392:
380:. Retrieved
370:
361:
350:. Retrieved
346:
307:
296:
292:
284:perinigricon
276:eccentricity
273:
258:
208:solar masses
204:
174:
173:
114:(1.226
35:Solar System
1928:Outer space
1916:Spaceflight
1638:HIP 41378 b
1598:55 Cancri b
1095:λ (Piautos)
1065:ζ (Tegmine)
1040:α (Acubens)
689:Merritt, D.
685:Mikkola, S.
186:light-years
84:Declination
1962:Categories
1694:Messier 67
1633:HD 73534 b
1623:β Cancri b
1590:Exoplanets
1060:ε (Meleph)
895:Astrophoto
887:Hydrogen α
865:OJ 287 on
820:1905.02689
813:(5): 108.
559:1607.03034
525:2023-02-27
498:2020-05-03
444:2004.13392
352:2008-07-10
316:References
265:black hole
193:. It is a
161:See also:
76:08 54 48.9
1892:Astronomy
1842:Abell 671
1811:4C +29.30
1628:GJ 3470 b
1547:HIP 41378
1220:Flamsteed
847:146808185
731:119276181
706:0912.1209
629:121149840
586:2075-4434
552:(4): 54.
471:216562421
437:(1): L1.
100:0.306000
1867:Category
1806:UGC 4457
1786:DLA0817g
1708:Galaxies
1663:Pr0201 b
1572:YBP 1194
1557:LHS 2090
1450:Variable
1115:ξ (Nahn)
1045:β (Tarf)
926:Archived
807:Universe
546:Galaxies
382:15 March
253:targeted
106:Distance
96:Redshift
1973:Quasars
1952:Science
1878:Portals
1791:IC 2431
1295:28 (CX)
899:Sky Map
867:WikiSky
825:Bibcode
773:Bibcode
711:Bibcode
656:Bibcode
609:Bibcode
564:Bibcode
449:Bibcode
183:billion
110:4
1796:OJ 287
1781:3C 215
1776:3C 212
1771:3C 191
1562:Pr0211
1552:K2-187
1365:50 (A)
1360:49 (b)
1350:45 (A)
1315:36 (c)
1285:25 (d)
1270:20 (d)
845:
729:
627:
584:
469:
372:SIMBAD
301:for a
175:OJ 287
163:Quasar
140:
131:BL Lac
63:Cancer
22:OJ 287
1904:Stars
1764:Other
1535:Other
1526:79498
1516:72946
1511:72945
1032:Bayer
1023:Stars
891:X-Ray
879:GALEX
843:S2CID
815:arXiv
727:S2CID
701:arXiv
625:S2CID
554:arXiv
467:S2CID
439:arXiv
427:(PDF)
249:3C279
245:CHIRP
177:is a
146:15.43
49:J2000
46:Epoch
1755:2812
1750:2775
1745:2623
1740:2608
1735:2536
1730:2535
1725:2503
883:IRAS
875:SDSS
871:DSS2
582:ISSN
384:2018
251:was
241:VLBA
125:Type
1717:NGC
833:doi
781:doi
769:646
719:doi
697:709
664:doi
652:643
617:doi
605:310
572:doi
457:doi
435:894
142:(V)
116:Gpc
112:Gly
1964::
1503:HD
1493:HM
1488:EI
1483:DX
1478:AZ
1473:VZ
1468:RS
1440:83
1435:80
1430:79
1425:78
1420:75
1415:71
1410:70
1405:68
1400:67
1395:66
1390:61
1385:60
1380:57
1375:54
1370:53
1355:46
1345:44
1340:42
1335:40
1330:39
1325:38
1320:37
1310:35
1305:34
1300:29
1290:27
1280:24
1275:21
1265:15
1260:12
1254:11
901:,
897:,
893:,
889:,
885:,
881:,
877:,
873:,
869::
841:.
831:.
823:.
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375:.
369:.
345:.
324:^
305:.
181:4
165:,
1880::
1658:f
1653:e
1648:d
1643:c
1618:f
1613:e
1608:d
1603:c
1463:X
1458:R
1248:8
1243:7
1238:5
1233:3
1228:1
1210:ω
1205:ω
1200:ψ
1195:ψ
1190:χ
1185:φ
1180:φ
1175:υ
1170:υ
1165:τ
1160:σ
1155:σ
1150:σ
1145:ρ
1135:π
1130:π
1125:ο
1120:ο
1110:ν
1105:μ
1100:μ
1090:κ
1085:ι
1080:θ
1075:η
1070:ζ
989:e
982:t
975:v
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910:(
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835::
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817::
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550:4
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459::
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51:)
44:(
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