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OGLE-2011-BLG-0462

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OGLE-2011-BLG-462
Animated astrometric observations of the gravitational microlensing of OGLE-2011-BLG-0462/MOA-2011-BLG-191
Object typeblack hole
Other designationsMOA-2011-BLG-191
Observation data
(Epoch 2455874.50236 (2011-11-09.00 UT))
ConstellationSagittarius Edit this on Wikidata
J2000.0 (17:51:40.19)
DeclinationJ2000.0 (-29:53:26.3)
Distance5,610 ly (1,720 pc)
Mass6.03 M☉
Related media on Wikimedia Commons
[edit on Wikidata]

OGLE-2011-BLG-0462, also known as MOA-2011-BLG-191, is a stellar-mass black hole isolated in interstellar space. OGLE-2011-BLG-0462 lies at a distance of 1,720 parsecs (5,610 light years) in the direction of the galactic bulge in the constellation Sagittarius. The black hole has a mass of about 6.03 M☉.[1] OGLE-2011-BLG-0462 is the first truly isolated black hole which has been confirmed.[2][3][4]

Discovery

OGLE-2011-BLG-0462 was discovered through microlensing when it passed in front of a background star that was 20,000 light years away from Earth. The black hole's gravity bent the star's light, causing a sharp spike in brightness that was detected by the Hubble Space Telescope. It took six years to confirm the existence of OGLE-2011-BLG-0462. Its initial kick velocity has been estimated to have an upper limit of 100 km/s.[5][6] No significant X-ray emission has been detected from gas accreting onto the black hole indicating that it is truly isolated.[7]

See also

References

  1. ^ Lam, Casey Y.; Lu, Jessica R. (2023-10-01). "A Reanalysis of the Isolated Black Hole Candidate OGLE-2011-BLG-0462/MOA-2011-BLG-191". The Astrophysical Journal. 955 (2): 116. arXiv:2308.03302. Bibcode:2023ApJ...955..116L. doi:10.3847/1538-4357/aced4a. ISSN 0004-637X.
  2. ^ Lam, Casey Y.; Lu, Jessica R.; Udalski, Andrzej; et al. (2022). ""An Isolated Mass-gap Black Hole or Neutron Star Detected with Astrometric Microlensing"". The Astrophysical Journal Letters. 933 (1): L23. arXiv:2202.01903. Bibcode:2022ApJ...933L..23L. doi:10.3847/2041-8213/ac7442.
  3. ^ Sahu, Kailash C.; Anderson, Jay; Casertano, Stefano; Bond, Howard E.; Udalski, Andrzej; Dominik, Martin; Calamida, Annalisa; Bellini, Andrea; Brown, Thomas M.; Rejkuba, Marina; Bajaj, Varun (2022-01-01). "An Isolated Stellar-mass Black Hole Detected through Astrometric Microlensing". The Astrophysical Journal. 933 (1): 83. arXiv:2201.13296. Bibcode:2022ApJ...933...83S. doi:10.3847/1538-4357/ac739e. S2CID 246430448.
  4. ^ "2011-BLG-0462". ogle.astrouw.edu.pl. Retrieved 2022-06-29.
  5. ^ Panjkov, Sonja (2023-01-27). "The Peculiar Nature of Black Hole Birth Kicks". astrobites. Retrieved 2023-01-28.
  6. ^ Andrews, Jeff J.; Kalogera, Vicky (2022-05-01). "Constraining Black Hole Natal Kicks with Astrometric Microlensing". The Astrophysical Journal. 930 (2): 159. arXiv:2203.15156. Bibcode:2022ApJ...930..159A. doi:10.3847/1538-4357/ac66d6. ISSN 0004-637X. S2CID 247778998.
  7. ^ Mereghetti, Sandro; Sidoli, Lara; Ponti, Gabriele; Treves, Aldo (2022-06-01). "X-Ray Observations of the Isolated Black Hole Candidate OGLE-2011-BLG-0462 and Other Collapsed Objects Discovered through Gravitational Microlensing". The Astrophysical Journal. 934 (1): 62. arXiv:2206.07480. Bibcode:2022ApJ...934...62M. doi:10.3847/1538-4357/ac7965. S2CID 249674753.


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