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FORMATION OF LOPSIDED AND BAR STRUCTURES IN NON-STATIONARY GRAVITATING SYSTEMS. I- ISOTROPIC CASE

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Title: FORMATION OF LOPSIDED AND BAR STRUCTURES IN NON-STATIONARY GRAVITATING SYSTEMS. I- ISOTROPIC CASE

Authors: M. Sultana, M. Khalid

Journal: The Nucleus

HEC Recognition History
Category From To
Y 2024-10-01 2025-12-31
Y 2023-07-01 2024-09-30
Y 2022-07-01 2023-06-30
Y 2020-07-01 2021-06-30

Publisher: Pakistan Institute of Nuclear Science & Technology (PINSTECH).

Country: Pakistan

Year: 2013

Volume: 50

Issue: 3

Language: English

Categories
Physics (3755) Computational Physics (89) Astronomy (142) Astrophysics (111) Celestial Mechanics (11)

Abstract

This is an examination of the gravitational instability of bar-like and lopsided structures of non-stationary isotropic disk model. Non-stationary analogs of the dispersion equation of these two oscillation modes are discussed, in this paper. Growth rates of both oscillation modes are found with the help of non-stationary dispersion equation. Results are presented in the form of graphs which show dependence of initial virial ratio on rotation parameter . A comparative analysis of the growth rates of both oscillation modes is made and found that lopsided structures overall dominates the bar-like structures.

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