Determination of the Physical Parameters of the Supermassive Black Hole at the Center of Our Galaxy

Details Determination of the Physical Parameters of the Supermassive Black Hole at the Center of Our Galaxy Determination of the Physical Parameters of the Supermassive Black Hole at the Center of Our Galaxy

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jena.confq..67k&link_type=abstract

"JENAM-2007, "Our non-stable Universe", held 20-25 August 2007 in Yerevan, Armenia. Abstract book, p. 67-67"

Astronomy and Astrophysics

Astrophysics

Scientific paper

The mass of the supermassive black hole (SMBH) at the center of our Galaxy was estimated using astrophysical methods, based on the empirical relation between the masses of black holes in the centers of galaxies and radio and X-ray luminosities of these regions. Also we had used two astrometric methods developed at Pulkovo observatory to derive the orbital elements of the star S2 rotated around the galactic center and thereby the mass of the black hole. It is shown that of our AMP (Apparent Motion Parameters) method, based on measurements of short orbital arc and observational data of radial velocity, has good efficiency. We estimated also the magnetic field magnitude near the event horizon of the supermassive black hole in the Galactic Center using the model of synchrotron emission with self-absorption. We have also estimated an angular momentum of the black hole. This estimate suggests, that the SMBH at the Galactic Center is a Schwarzschild than Kerr black hole, since we estimate the Kerr parameter to be a/M ~0.01 (in units with G = c = 1).

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