A Comparison between Different Methods to Study the Supermassive Black Hole Mass - Pitch Angle Relation

Abstract

In this study, we compared the different Methods of determination of SMBH masses to study a correlation between mass of supermassive black hole and spiral arm pitch angle for 41 images of spiral galaxies using Spitzer/IRAS 3.6-µm. We selected four methods to find a determination mass of SMBH. Velocity dispersions (σ) measurements and pitch angle of spiral arm took from the literature. In addition, SMBH masses estimates using a several methods (reverberation mapping RM, stellar dynamics SD, gas dynamics GD) from the literature from. In addition, the determinations of SMBH masses were found using the (MBH-σ) relation. Finally, we compared the (MBH-P) relation for these galaxies using each method with the Seigar’s equation, and found the results to agree for these methods.