Gravitational Instability of Perturbations of a Nonlinear Nonstationary Model of a Disklike System. IV. Formation of Double-ring Structures in Galaxies
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引用次数: 0
Abstract
To find out precise criteria of double-ring structure formation in galaxies, we have studied the problem of gravitational instability of the corresponding structure oscillation modes in the background of a previously described compound disk model [1, 2, 3] with an exact nonlinear law of nonstationarity. Nonstationary analogs have been derived for the dispersion equations for these structure oscillation modes of the model, and the results of their analysis are discussed. A comparative analysis has been carried out for the instability increments of ringlike oscillation modes, aimed at determining the dependence of their characteristic manifestation times on the physical parameters of the model.
期刊介绍：
Gravitation and Cosmology is a peer-reviewed periodical, dealing with the full range of topics of gravitational physics and relativistic cosmology and published under the auspices of the Russian Gravitation Society and Peoples’ Friendship University of Russia. The journal publishes research papers, review articles and brief communications on the following fields: theoretical (classical and quantum) gravitation; relativistic astrophysics and cosmology, exact solutions and modern mathematical methods in gravitation and cosmology, including Lie groups, geometry and topology; unification theories including gravitation; fundamental physical constants and their possible variations; fundamental gravity experiments on Earth and in space; related topics. It also publishes selected old papers which have not lost their topicality but were previously published only in Russian and were not available to the worldwide research community
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