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Supermassive black holes
- When galaxies themselves collide and merge, scientists theorize that the supermassive black holes at their hearts move together, forming a binary pairing.
www.space.com › supermassive-black-holes-pair-heaviest-stalled-mergerHeaviest pair of black holes ever seen weighs 28 billion ...
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What are binary black holes?
What happens when a binary black hole merges?
Which physical processes lead to the formation of stellar binary black holes?
What are supermassive black-hole binaries?
Jun 29, 2021 · A: These two systems are important since they are the first clear discovery of neutron star black hole binaries, a type of source that had never been observed, with either electromagnetic or gravitational waves. It tells us that these systems do exist but are more rare than binary neutron stars.
- Black Hole Formation from Single Stars: Where We Stand Now
- Binary BH Formation in Isolation
- Binary BH Formation in Star Clusters
- Funding
- Conflict of Interest
About 4 years ago, the LIGO detectors obtained the first direct detection of gravitational waves, GW150914 (Abbott et al., 2016; Abbott et al., 2016a,b), associated with the merger of two black holes (BHs). This event marks the dawn of gravitational wave astronomy: we now know that binary black holes (BBHs) exist, can reach coalescence by gravitati...
The scenario highlighted in the previous section assumes that the progenitor star is single. But gravitational waves have shown the existence of BBHs with a very short orbital separation: the initial separation of a BBH must be of the order of few ten solar radii for the BBH to merge within a Hubble time by gravitational-wave emission. This challen...
Star clusters are among the densest places in the Universe. There is a plethora of star clusters, with their distinguishing features: (i) globular clusters (Gratton et al., 2019) are old (~ 12 Gyr) and massive systems (~ 104−6 M⊙), (ii) nuclear star clusters can be even more massive (~ 107 M⊙) and lie at the center of many galaxies, in some cases c...
MM acknowledges financial support from the European Research Council for the ERC Consolidator grant DEMOBLACK, under contract no. 770017.
The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
- Michela Mapelli, Michela Mapelli
- 2020
Supermassive black-hole (SMBH) binaries are believed to form during galaxy mergers. Some likely candidates for binary black holes are galaxies with double cores still far apart. An example active double nucleus is NGC 6240. Much closer black-hole binaries are likely in single-core galaxies with double emission lines.
Jun 29, 2021 · Astronomers have spent decades searching for neutron stars orbiting black holes in the Milky Way, our home galaxy, but have found none so far. "With this new discovery of neutron star- black hole mergers outside our galaxy, we have found the missing type of binary.
Oct 8, 2020 · The merger of a binary black hole gives birth to a highly distorted final black hole. The gravitational radiation emitted as this black hole relaxes presents us with the unique...
- Juan Calderon Bustillo, Christopher Evans, James A. Clark, Grace Kim, Grace Kim, Pablo Laguna, Pablo...
- 2020
Jun 29, 2023 · Merging binary black holes form with a non-negligible rate ( $$\sim 4\times 1{0}^{-7}\,{M}_{\odot }^{-1}$$ ) and their progenitor stars with initial masses ≳50 M⊙ do not expand to...
Jul 26, 2021 · Metrics. Abstract. While most of the compact-binary mergers detected by LIGO and Virgo are expected to consist of first-generation black holes formed from the collapse of stars, others might...
