OGLE-2011-BLG-0462

Last updated
OGLE-2011-BLG-462
Rogue black hole OGLE-2011-BLG-0462.gif
Animated astrometric observations of the gravitational microlensing of OGLE-2011-BLG-0462/MOA-2011-BLG-191
Observation data
Epoch 2455874.50236 (2011-11-09.00 UT)       Equinox 2455874.50236 (2011-11-09.00 UT)
Constellation Sagittarius
Right ascension 17h 51m 40.19s
Declination −29° 53′ 26.3″
Astrometry
Distance 5,610  ly
(1,720  pc)
Details
Mass 6.03  M☉
Other designations
MOA-2011-BLG-191
Database references
SIMBAD data

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]

Contents

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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