BEHAVIOR OF SECTORIAL INSTABILITIES DEPENDING ON THE PARAMETERS OF THE GENERALIZED MODEL OF A SELF-GRAVITATING DISK
Section: STARS AND THE INTERSTELLAR MEDIUM
Authors:
1.
National University of Uzbekistan named after Mirzo Ulugbek
2.
Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences
Type:
Сonference article
Published:
27.12.2024
Subject area:
UDC 52
UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
BISAK SCI004000 Astronomy
BISAK SCI005000 Physics / Astrophysics
UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
BISAK SCI004000 Astronomy
BISAK SCI005000 Physics / Astrophysics
Language:
English
Keywords:
galaxies: evolution, formation, kinematics and dynamics, structure
Abstract (English):
In this work we study the problem of gravitational instability in the generalized model of a nonlinearly radially pulsating disk with an anisotropic velocity diagram relative to sectoral perturbation modes. This model is a nonstationary generalization of the equilibrium self-gravitating disk of Bisnovatyi-Kogan and Zeldovich. Nonstationary analogues of dispersion equations (NADE) are obtained on the background of this generalized model for sectoral modes of perturbations. Based on the results of numerical calculations of NADE, graphs comparing the increments of instability as a function of the initial virial ratio of the system for different values of the parameters and , characterizing the difference and the degree of anisotropy of the nonlinearly nonstationary generalized model of the self-gravitating disk, are constructed. In particular, it is found that the development of the bar-like perturbation mode will be the same for all anisotropic models, since the NADE of this mode does not depend on these parameters and .
In this work we study the problem of gravitational instability in the generalized model of a nonlinearly radially pulsating disk with an anisotropic velocity diagram relative to sectoral perturbation modes. This model is a nonstationary generalization of the equilibrium self-gravitating disk of Bisnovatyi-Kogan and Zeldovich. Nonstationary analogues of dispersion equations (NADE) are obtained on the background of this generalized model for sectoral modes of perturbations. Based on the results of numerical calculations of NADE, graphs comparing the increments of instability as a function of the initial virial ratio of the system for different values of the parameters and , characterizing the difference and the degree of anisotropy of the nonlinearly nonstationary generalized model of the self-gravitating disk, are constructed. In particular, it is found that the development of the bar-like perturbation mode will be the same for all anisotropic models, since the NADE of this mode does not depend on these parameters and .
Keywords:
galaxies: evolution, formation, kinematics and dynamics, structure
galaxies: evolution, formation, kinematics and dynamics, structure
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