Theoretical investigation for the relation (supermassive black hole mass)_(spiral arm pitch angle): a correlation for galaxies with classical bulges

2nd International Scientific Conference (Pure Sciences, Brilliant Creativity and Renewed Building)

Al-Baidhany, Ismaeel A.^1 ; Chiad, Sami S.^1 ; Jabbar, Wasmaa A.^1 ; Hussein, Rasha A.^2 ; Hussain, Firas F.K.^3 ; Habubi, Nadir F.^1

Department of Physics, College of Education, Mustansiriyah University, Baghdad, Iraq^1

College of Engineering, Al-Muthanna University, Baghdad, Iraq^2

Department of Physics, College of Science, Al-Muthanna University, Baghdad, Iraq^3

关键词: Evolution of galaxies;    Pitch angle;    Spiral galaxies;    Spiral structures;    Supermassive black holes;    Theoretical investigations;    Two dimensional fast Fourier transforms;    Velocity dispersion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/571/1/012118/pdf
DOI  :  10.1088/1757-899X/571/1/012118

来源: IOP

【 摘 要 】

In this work, the determination of the masses of supermassive black holes (SMBHs) and the properties of their host spiral galaxies are focused for the purposes of constraining scaling relations and with the aim of understanding the role of SMBHs in the evolution of galaxies. The measurements of SMBHs mass for a sample of 40 spiral galaxies were studied by applying indirect techniques (the SMBHs mass versus stellar/gas velocity dispersion relation). In addition, spiral arm pitch angle of a sample of nearly face-on spiral galaxies were measured using IRAF (The Image Reduction and Analysis Facility) and two-dimensional Fast Fourier Transform (2DFFT) program. Finally, we present a new correlation between spiral arm pitch angle (a measure of the tightness of spiral structure) and the mass of supermassive black holes (BHs) in the nuclei of classical galaxies.