TITLE:
On the M-σ Relationship and SMBH Mass Estimates of Selected Nearby Galaxies
AUTHORS:
Alper K. Ateş, Can Battal Kılınç, Cafer İbanoğlu
KEYWORDS:
Galaxies; Active Galaxies; AGN; SMBH; Stellar Velocity Dispersion; Bulge Velocity Dispersion
JOURNAL NAME:
International Journal of Astronomy and Astrophysics,
Vol.3 No.3A,
July
18,
2013
ABSTRACT:
Super massive black holes are believed to influence galactic
evolution and dynamics. A histogram of SMBH masses for different redshift regimes
may reveal clues on how the SMBH evolve in time. A prominent method for SMBH mass
estimation is based on the linear correlation between the bulge velocity dispersion
and the SMBH mass. Known as M-σ relationship,
this method is known to provide reasonable but not very accurate mass estimates
due to considerable scatter in data. In order to increase the precision,
we surveyed the literature and gathered SMBH and velocity dispersion data for low
redshift (z 0.02) spiral galaxies.
We report the M-σ relationship for low
redshift spiral galaxies as,
By using this refined M-σ relationship we measured 32 SMBH masses and determined upper and lower
mass boundaries and the mass histogram for spiral galaxies in a narrow redshift
regime (0.016 z σ relationship. The estimated masses
vary between 9.51 × 106 - 2.36 × 108 solar masses.