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Gaia BH2 (Gaia DR3 5870569352746779008) is a binary system consisting of a red giant and what is very likely a stellar-mass black hole.Gaia BH2 is located about 3,800 light years away (1.16 kpc away) in the constellation of Centaurus, making it as of 2024 the third-closest known black hole system to Earth.
The star field behind the black holes is being heavily distorted and appears to rotate and move, due to extreme gravitational lensing, as space-time itself is distorted and dragged around by the rotating black holes. [1] A binary black hole (BBH), or black hole binary, is a system consisting of two black holes in close
The star and black hole orbit each other with a period of 185.59 days and an eccentricity of 0.45. The star is similar to the Sun , with about 0.93 M ☉ and 0.99 R ☉ , and a temperature of about 5,850 K (5,580 °C ; 10,070 °F ), while the black hole has a mass of about 9.62 M ☉ . [ 3 ]
Candidate isolated black hole detected by microlensing [20] 18 h 05 m 05.28 s: −28° 34′ 41.70″ 2002 BH: 7.5: Very strong candidate 25 600 ± 600: 7.86 ± 0.2: Sagittarius A*: Supermassive black hole 17 h 45 m 40.0409 s: −29° 0′ 28.118″ 1974 BH: 4 154 000 ± 14 000: Center of the Galaxy 29 700 ± 2700: 9.1 ± 0.8: 4U 1543-475 ...
In order to reproduce all the known outbursts, the rotation of the primary black hole is calculated to be 38% of the maximum allowed rotation for a Kerr black hole. [10] [4] The companion's orbit is decaying via the emission of gravitational radiation and it is expected to merge with the central black hole within approximately 10,000 years. [11 ...
Known gravitational wave events come from the merger of two black holes (BH), two neutron stars (NS), or a black hole and a neutron star (BHNS). [ 9 ] [ 10 ] Some objects are in the mass gap between the largest predicted neutron star masses ( Tolman–Oppenheimer–Volkoff limit ) and the smallest known black holes.
The supermassive black hole at the core of Messier 87, here shown by an image by the Event Horizon Telescope, is among the black holes in this list. This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses ( M ☉ ), approximately 2 × 10 30 kilograms .
The black hole's mass is 32.70 M ☉, the heaviest known stellar black hole in the Milky Way. The black hole Gaia BH3 is the second known stellar black hole more massive than about 10 M ☉ (with the first being Cygnus X-1). [2] The mass of Gaia BH3 is quite similar to the mass of merging binary black holes found via gravitational waves. These ...