Determine the mass of supermassive black hole in the centre of M31 in different methods
Abstract
In this work, We compared a new value of supermassive black hole masses (SMBH) in Andromeda galaxy has been estimated using different methods (first, direct methods e.g. gas dynamics and, stellar dynamics, second, indirect methods e.g. MBH-dispersion velocity (σ*), MBH-rotation velocity (Vrot), MBH- Sersic index (n), MBH-bulge luminosity (Lbulge), MBH- pitch angle (P), MBH-bulge dynamical mass (Mdyn), and MBH-bulge stellar mass (Mst.) relations). We found the values of masses using the indirect methods are in reasonable agreement with the recent values from the direct methods.
We found the pitch angle of Andromeda by using the image of Spitzer/IRAC 3.6 um of nearly face-on and a program of IRAF to measure the ellipticity and its position angle in order to deproject the Andromeda image to face-on. A two- dimensional Fast Fourier Transform was used to deprojected Andromeda image to find the pitch angle.- Publication:
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American Institute of Physics Conference Series
- Pub Date:
- December 2020
- DOI:
- 10.1063/5.0027838
- Bibcode:
- 2020AIPC.2290e0050A