Dokuchaev, V.I.; Nazarova, N.O. The Brightest Point in Accretion Disk and Black Hole Spin: Implication to the Image of Black Hole M87*. Universe2019, 5, 183.
Dokuchaev, V.I.; Nazarova, N.O. The Brightest Point in Accretion Disk and Black Hole Spin: Implication to the Image of Black Hole M87*. Universe 2019, 5, 183.
Dokuchaev, V.I.; Nazarova, N.O. The Brightest Point in Accretion Disk and Black Hole Spin: Implication to the Image of Black Hole M87*. Universe2019, 5, 183.
Dokuchaev, V.I.; Nazarova, N.O. The Brightest Point in Accretion Disk and Black Hole Spin: Implication to the Image of Black Hole M87*. Universe 2019, 5, 183.
Abstract
A dark region and a bright part of accretion disk are viewed on the first image of the supermassive black hole in the galaxy M87 obtained by the Event Horizon Telescope. We demonstrate that a viewed dark region is a silhouette of the black hole event horizon, while the outline (contour) of this silhouette is an equator of the event horizon globe. A dark silhouette of the black hole event horizon is placed within the expected position of the black hole shadow, which is not revealed on the first image. We calculate numerically a relation between the viewed position of the black hole silhouette and the brightest point in a thin accretion disk in dependence of the black hole spin. A spin of the supermassive black hole in the galaxy M87, derived from this relation, is $a=0.75\pm0.15$.
Keywords
General Relativity, gravity, black hole, black hole shadow
Subject
Physical Sciences, Astronomy and Astrophysics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
