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{{Short description|Region where a supermassive black hole gravitationally dominates its galaxy}} ...[supermassive black hole]] in which the [[gravitational potential]] of the black hole dominates the gravitational potential of the host [[galaxy]]. The radi ...

...cretion]] onto a [[supermassive black hole]], then such supermassive black holes must exist in our local universe as "dead" quasars. ...an order of magnitude the masses of several of the closest [[supermassive black hole]]s including the ones in the [[Milky Way]], [[Andromeda Galaxy|M31]], ...

{{short description|Sudden change of spin axis caused by merging with another black hole}} {{About|black hole spin-flips|atomic spin-flips|Hydrogen line}} ...

.../ref> Hence, the presence (or not) of a poloidal magnetic field around the black hole is not determinant in its overall power output. It was also suggested ...outgoing flux of angular momentum results in extraction of energy from the black hole. ...

Consider a binary that consists of two massive objects (stars, black holes etc.) and that is embedded in a [[stellar system]] containing a large numbe ...binary, which in turn alters the direction of the spin axis of the single black hole that forms when the two coalesce. ...

...em composed entirely of luminous stars (i.e. no [[dark matter]] or [[black holes]]). ...mator has been successfully used to measure the mass of the [[supermassive black hole]] at the center of the [[Milky Way]] galaxy.<ref>{{Cite journal ...

[[Image:msigma.jpg|thumb|right|250px|Black-hole mass plotted against velocity dispersion of stars in a galaxy bulge. P ...[galaxy]] [[bulge (astronomy)|bulge]] and the mass M of the [[supermassive black hole]] at its center. ...

...ce for a moderate spin from X-ray reflection of the high-mass supermassive black hole in the cluster-hosted quasar H1821+643 ==Supermassive Black Hole== ...

{{Short description|Cluster of stars around a supermassive black hole}} ...ose to the black hole at the time of the ejection will remain bound to the black hole after it leaves the galaxy, forming the HCSS. ...

...all–Wolf cusp. The unit of length is the black hole [[sphere of influence (black hole)|influence radius]]. The elapsed time is roughly one [[relaxation (phy ...form, such that the density of stars, ''ρ'', varies with distance from the black hole, ''r'', as ...

...l=https://web.archive.org/web/20200626004744/https://phys.org/news/2020-06-black-hole-collision.html |url-status=live }}</ref> ...IGO-20200902">{{cite news |author=Martin |title=GW190521: The Most Massive Black Hole collision Observed To Date |url=https://www.ligo.org/science/Publicati ...

{{Short description|High-mass black hole seeds}} ...|website=Press Room |title=NASA Telescopes Find Clues For How Giant Black Holes Formed So Quickly |date=24 May 2016|url=https://chandra.si.edu/press/16_rel ...

...termined.<ref name="a+2018">{{cite journal |title=Properties of the Binary Black Hole Merger GW150914 |first1=B. P. |last1=Abbott |collaboration=LIGO Scient ...y for the gravitational-wave sources in the vicinity of supermassive black holes ...

...g apart of a star by tidal forces when it gets too close to a supermassive black hole}} ...Fate of Stars on Parabolic Orbits Tidally Disrupted by Supermassive Black Holes |journal=The Astrophysical Journal Letters |volume=971 |issue=2 |pages=L46 ...

{{Short description|System consisting of two black holes in close orbit around each other}} ...dragged around by the rotating black holes.<ref>Credits: [http://www.black-holes.org SXS (Simulating eXtreme Spacetimes) project].</ref>]] ...

...sive Than the Sun |url=https://www.space.com/39000-oldest-farthest-monster-black-hole-yet.html |date=6 December 2017 |work=[[Space.com]] |access-date=6 Dece ...announced the discovery of ULAS J1120+0641, explained, "The super-massive black hole itself is dark but it has a disc of gas or dust around it that has bec ...

...ely astrophysical sources of such GWs are supermassive [[Black hole binary|black hole binaries]] in the centres of [[Galaxy merger|merging galaxies]], where ...<!-- This page does have a "Merger" subsection, but it is very brief. -->|black hole mergers]]. The amplitudes can describe the history of how galaxies wer ...

...l>{{cite journal |last=Curiel |first=Erik |title=The many definitions of a black hole |journal=Nature Astronomy |year=2019 |volume=3 |pages=27–34 |doi=10.10 .... |author-link=Eric Chaisson |title=Relatively Speaking: Relativity, Black Holes, and the Fate of the Universe |url=https://archive.org/details/relativelysp ...

{{Short description|Hypothetical black hole formed soon after the Big Bang}} ...ormation of the universe without (above) and with (below) primordial black holes]] ...

...to Penrose, fermions must be irreversibly converted into radiation during black hole evaporation, to preserve the smoothness of the boundary between aeons. ...", remnant signals from the "[[Hawking evaporation]] of supermassive black holes in the aeon prior to ours". The original version of their paper claimed tha ...