Numerical studies of instability of generalized polytropic models of stellar disks

Research outputpeer-review

Abstract

The distribution function for generalized polytropic models has been used to construct a series of numerical models of anisotropic disks. It has been shown with the help of simulation that such systems are unstable with respect to bar formation at any degree of radial elongation of star orbits. The result is completely at variance with the conclusions of earlier works, where similar models were studied. The pattern speeds and amplitudes of the forming bar were found, and the initial distributions of orbit precession rates were calculated. Such systems have been shown to fulfill all conditions for the onset of radial orbit instability, responsible for the formation of a slow bar.

Original languageEnglish
Article number012009
Number of pages7
JournalJournal of Physics: Conference Series
Volume929
Issue number1
DOIs
Publication statusPublished - 27 Nov 2017
EventInternational Conference PhysicA.SPb 2016 - Saint-Petersburg
Duration: 1 Nov 20163 Nov 2016

Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Numerical studies of instability of generalized polytropic models of stellar disks",
abstract = "The distribution function for generalized polytropic models has been used to construct a series of numerical models of anisotropic disks. It has been shown with the help of simulation that such systems are unstable with respect to bar formation at any degree of radial elongation of star orbits. The result is completely at variance with the conclusions of earlier works, where similar models were studied. The pattern speeds and amplitudes of the forming bar were found, and the initial distributions of orbit precession rates were calculated. Such systems have been shown to fulfill all conditions for the onset of radial orbit instability, responsible for the formation of a slow bar.",
author = "Sotnikova, {N. Ya} and Смирнов, {Антон Александрович}",
year = "2017",
month = "11",
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language = "English",
volume = "929",
journal = "Journal of Physics: Conference Series",
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AU - Смирнов, Антон Александрович

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Y1 - 2017/11/27

N2 - The distribution function for generalized polytropic models has been used to construct a series of numerical models of anisotropic disks. It has been shown with the help of simulation that such systems are unstable with respect to bar formation at any degree of radial elongation of star orbits. The result is completely at variance with the conclusions of earlier works, where similar models were studied. The pattern speeds and amplitudes of the forming bar were found, and the initial distributions of orbit precession rates were calculated. Such systems have been shown to fulfill all conditions for the onset of radial orbit instability, responsible for the formation of a slow bar.

AB - The distribution function for generalized polytropic models has been used to construct a series of numerical models of anisotropic disks. It has been shown with the help of simulation that such systems are unstable with respect to bar formation at any degree of radial elongation of star orbits. The result is completely at variance with the conclusions of earlier works, where similar models were studied. The pattern speeds and amplitudes of the forming bar were found, and the initial distributions of orbit precession rates were calculated. Such systems have been shown to fulfill all conditions for the onset of radial orbit instability, responsible for the formation of a slow bar.

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JF - Journal of Physics: Conference Series

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