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“At a distance of about 18,000 light-years, this is the closest known example of a massive black hole.” The supermassive black hole in the centre of the Milky Way is at a distance of about ...
The event horizons bounding the black hole and white hole interior regions are also a pair of straight lines at 45 degrees, reflecting the fact that a light ray emitted at the horizon in a radial direction (aimed outward in the case of the black hole, inward in the case of the white hole) would remain on the horizon forever.
The horizon r = 2GM and finite v (the black hole horizon) is different from that with r = 2GM and finite u (the white hole horizon) . The metric in Kruskal–Szekeres coordinates covers all of the extended Schwarzschild spacetime in a single coordinate system. Its chief disadvantage is that in those coordinates the metric depends on both the ...
First black hole to have an accurate parallax measurement of its distance from our solar system B K [4] 0.7: Early K giant star 8100 ± 1000: 2.49 ± 0.30: GRO J0422+32: Binary star system with orbit t=5.09 h 04 h 21 m 42.723 s +32° 54′ 26.94″ 1992 Aug 5 A BH: 3.97 ± 0.95: B M1: 0.5 ± 0.1: 8150: 2.5: MACHO-96-BLG-5: Candidate isolated ...
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The Kerr metric or Kerr geometry describes the geometry of empty spacetime around a rotating uncharged axially symmetric black hole with a quasispherical event horizon.The Kerr metric is an exact solution of the Einstein field equations of general relativity; these equations are highly non-linear, which makes exact solutions very difficult to find.
Stellar black hole – black hole formed by the gravitational collapse of a massive star. [1] They have masses ranging from about three to several tens of solar masses. Intermediate-mass black hole – black hole whose mass is significantly more than stellar black holes yet far less than supermassive black holes.
Light from the accretion disk around a supermassive black hole is scattered off the surrounding broad line region, causing a delayed echo at redder wavelengths. Reverberation mapping (or Echo mapping ) is an astrophysical technique for measuring the structure of the broad-line region (BLR) around a supermassive black hole at the center of an ...