Dependences of Characteristics of Bulges on the Mass of the Central Black Hole and Theoretical Aspects of Their Origin

F. U. Botirov; Ботиров Ф. У.; S. N. Nuritdinov; Нуритдинов С. Н.; A. E. Ashurov; Ашуров А. Е.

doi:10.31857/S0004629923050018

Dependences of Characteristics of Bulges on the Mass of the Central Black Hole and Theoretical Aspects of Their Origin

Authors: Botirov F.U.¹, Nuritdinov S.N.¹, Ashurov A.E.²
Affiliations:
1. M. Ulugbek National University of Uzbekistan
2. L.N. Gumilev Eurasian National University
Issue: Vol 100, No 5 (2023)
Pages: 404-413
Section: Articles
URL: https://journals.rcsi.science/0004-6299/article/view/139080
DOI: https://doi.org/10.31857/S0004629923050018
EDN: https://elibrary.ru/YVOQDS
ID: 139080

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Abstract
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Abstract

To study the influence of the central black hole on the formation of the bulge of spiral galaxies, we analyzed the relationship between the masses of supermassive black holes (SMBHs) and the parameters of their bulges. Unlike other authors, we consider only spiral galaxies. In this paper, we present empirical formulas derived from observations of 54 spiral galaxies, establishing connections between the mass of the central black hole (MBH), the bulge stellar mass (Mbulge), and the velocity dispersion (σ) of stars in it. A non-linear non-stationary disk model with an anisotropic velocity diagram is constructed. Within this model, the instabilities of individual perturbation modes are studied. The increments of instability are calculated depending on the physical parameters of the model. These values are compared across three perturbation modes. The paper is partly based on the report presented at the conference “Modern Stellar Astronomy-2022,” held at the Caucasian Mountain Observatory of the Sternberg Astronomical Institute of Lomonosov Moscow State University, on November 8–10, 2022.

Keywords

nonlinear model, non-stationary self-gravitating disk, bulge of the galaxy

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