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This is a list of black holes (and stars considered probable candidates) organized by size (including black holes of undetermined mass); some items in this list are galaxies or star clusters that are believed to be organized around a black hole. Messier and New General Catalogue designations are given where possible.


Super massive black holes and candidatesEdit


Intermediate-mass black holes and candidatesEdit

Stellar black holes and candidatesEdit

Black holes detected by gravitational wave signalsEdit

As of February 2019, 10 mergers of binary black holes have been observed. In each case two black holes merged to a larger black hole. In addition, one neutron star merger has been observed (GW170817), forming a black hole.

Multiple black hole systemsEdit

Binary black holesEdit

  • SDSS J120136.02+300305.5 core black holes — a pair of supermassive blackholes at the centre of this galaxy[7]
  • PG 1302-102 – the first binary-cored quasar — a pair of supermassive blackholes at the core of this quasar[8][9]

In addition, the signal of several binary black holes merging into a single black hole and in so doing producing gravitational waves have been observed by the LIGO instrument. These are listed above in the section Black holes detected by gravitational wave signals.

Trinary black holesEdit

As of 2014, there are 5 triple black hole systems known.[10]

See alsoEdit


  1. ^ M87's satellite galaxy NGC 4486B, SEDS
  2. ^ Burke, Mark J.; Raychaudhury, Somak; Kraft, Ralph P.; Brassington, Nicola J.; Hardcastle, Martin J.; Goodger, Joanna L.; Sivakoff, Gregory R.; Forman, William R.; Jones, Christine; Woodley, Kristin A.; Murray, Stephen S.; Kainulainen, Jouni; Birkinshaw, Mark; Croston, Judith H.; Evans, Daniel A.; Gilfanov, Marat; Jordán, Andrés; Sarazin, Craig L.; Voss, Rasmus; Worrall, Diana M.; Zhang, Zhongli (2012). "A Transient Sub-Eddington Black Hole X-Ray Binary Candidate in the Dust Lanes of Centaurus A". The Astrophysical Journal. 749 (2): 112. arXiv:1202.3149. Bibcode:2012ApJ...749..112B. doi:10.1088/0004-637X/749/2/112.CS1 maint: Uses authors parameter (link)
  3. ^ a b Andrea Thompson (1 April 2008). "Smallest Black Hole Found".
  4. ^ Knapp, Alex (2012-02-22). "The Smallest Known Black Hole Has 20 Million Mile Per Hour Winds". Forbes. LLC. Retrieved 2012-02-22.
  5. ^, "NASA's RXTE Detects 'Heartbeat' of Smallest Black Hole Candidate", 2011.12.15 (accessed 2011.12.17)
  6. ^ ScienceDaily, "Heaviest Stellar Black Hole Discovered In Nearby Galaxy", Oct. 18, 2007 (accessed 12-12-2009)
  7. ^ ESA (25 April 2014). "Unique pair of hidden black holes discovered by XMM-Newton". Space Daily.
  8. ^ Xaq Rzetelny (8 January 2015). "Supermassive black hole binary discovered".
  9. ^ Matthew J. Graham; S. George Djorgovski; Daniel Stern; Eilat Glikman; Andrew J. Drake; Ashish A. Mahabal; et al. (25 July 2014). "A possible close supermassive black-hole binary in a quasar with optical periodicity". Nature (published 7 January 2015). 518 (7537): 74–76. arXiv:1501.01375. Bibcode:2015Natur.518...74G. doi:10.1038/nature14143. ISSN 0028-0836. PMID 25561176.
  10. ^ a b Deane, R. P.; Paragi, Z.; Jarvis, M. J.; Coriat, M.; Bernardi, G.; Fender, R. P.; et al. (24 June 2014). "A close-pair binary in a distant triple supermassive black hole system". Nature (published July 2014). 511 (7507): 57–60. arXiv:1406.6365. Bibcode:2014Natur.511...57D. doi:10.1038/nature13454. PMID 24990745.
  11. ^ Schawinski, Kevin; Urry, Meg; Treister, Ezequiel; Simmons, Brooke; Natarajan, Priyamvada; Glikman, Eilat (29 November 2011). "Evidence for Three Accreting Black Holes in a Galaxy at z ~ 1.35: A Snapshot of Recently Formed Black Hole Seeds?". The Astrophysical Journal Letters (published December 2011). 743 (2): 6. arXiv:1111.6973. Bibcode:2011ApJ...743L..37S. doi:10.1088/2041-8205/743/2/L37. L37.
  12. ^ Liu, Xin; Shen, Yue; Strauss, Michael A. (18 April 2011). "Cosmic Train Wreck by Massive Black Holes: Discovery of a Kiloparsec-scale Triple Active Galactic Nucleus". The Astrophysical Journal Letters (published July 2011). 736 (1): L7–L11. arXiv:1104.3391. Bibcode:2011ApJ...736L...7L. doi:10.1088/2041-8205/736/1/L7. L7.

See alsoEdit

External linksEdit