binary black hole (BBH), or black hole binary, is an astronomical object consisting of two black holes in close orbit around each other. Like black holes...

black hole ever found, estimated at 66 billion solar masses) 3C 371 4C +37.11 (this radio galaxy is believed to have binary supermassive black holes) AP...

A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a star. They have masses ranging from about...

list of known black holes that are close to the Solar System. It is thought that most black holes are solitary, but black holes in binary or larger systems...

also the first observation of a binary black hole merger, demonstrating both the existence of binary stellar-mass black hole systems and the fact that such...

Benjamin F. (2021-03-01). "The Wolf–Rayet + Black Hole Binary NGC 300 X-1: What is the Mass of the Black Hole?". The Astrophysical Journal. 910 (1): 74...

all massive galaxies. In some galaxies, there are even binary systems of supermassive black holes (see the OJ 287 system.) Unambiguous dynamical evidence...

In this way, astronomers have identified numerous stellar black hole candidates in binary systems and established that the radio source known as Sagittarius...

A supermassive black hole (SMBH or sometimes SBH) is the largest type of black hole, with its mass being on the order of hundreds of thousands, or millions...

An intermediate-mass black hole (IMBH) is a class of black hole with mass in the range of one hundred to one hundred thousand (102–105) solar masses: significantly...

is a black hole binary system in the Triangulum Galaxy. The system is made up of a stellar-mass black hole and a companion star. The black hole in M33...

4318465066420528000) is a binary system consisting of a metal-poor giant star with spectral type G and a stellar-mass black hole. Gaia BH3 is located 1926...

produced by cataclysmic events such as the merger of binary black holes, the coalescence of binary neutron stars, supernova explosions and processes including...

binaries are Sirius, and Cygnus X-1 (Cygnus X-1 being a well-known black hole). Binary stars are also common as the nuclei of many planetary nebulae, and...

Microquasars (radio-jet X-ray binaries that can house either a neutron star or a black hole) A low-mass X-ray binary (LMXB) is a binary star system where one...

In gravitational wave astronomy, a golden binary is a binary black hole collision event whose inspiral and ringdown phases have been measured accurately...

geometry of empty spacetime around a rotating uncharged axially symmetric black hole with a quasispherical event horizon. The Kerr metric is an exact solution...

circular published in the public alerts tracker. The first O3/2019 binary black hole detection alert was broadcast on 8 April 2019. A significant percentage...

com/2015/08/31/us/double-black-hole-nasa-hubble-feat/ http://www.sci-news.com/astronomy/science-supermassive-binary-black-hole-markarian231-03180.html...

DR3 4373465352415301632) is a binary system consisting of a G-type main-sequence star and a likely stellar-mass black hole, located about 1,560 light-years...

black holes and subsequent ringdown of the resulting single black hole. The observations demonstrated the existence of binary stellar-mass black hole...

problem. In the late 1990s, the Binary Black Hole Grand Challenge Alliance successfully simulated a head-on binary black hole collision. As a post-processing...

A black hole bomb is the name given to a physical effect utilizing how a bosonic field impinging on a rotating black hole can be amplified through superradiant...

Abbott, B.; et al. (2016). "Observation of Gravitational Waves from a Binary Black Hole Merger". Physical Review Letters. 116 (6): 061102. arXiv:1602.03837...

J.; et al. (2020). "Candidate Electromagnetic Counterpart to the Binary Black Hole Merger Gravitational-Wave Event S190521g" (PDF). Physical Review Letters...

B.P.; et al. (2016). "Observation of Gravitational Waves from a Binary Black Hole Merger". Phys. Rev. Lett. 116 (6): 061102. arXiv:1602.03837. Bibcode:2016PhRvL...

observations as the first binary with a stellar black hole candidate 1972 — Stephen Hawking proves that the area of a classical black hole's event horizon cannot...

detection on 14 September 2015, observing gravitational waves from a binary black hole. A second gravitational wave was detected on 26 December 2015 and...

independent unresolved gravitational-wave sources, like supermassive black-hole binaries. Detecting the gravitational wave background can provide information...

massive black holes at the centre of galaxies, massive black holes orbited by small compact objects, known as extreme mass ratio inspirals, binaries of compact...