Instability analysis of a cylindrical stellar object in brans–dicke gravity.
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Date
2016
Authors
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Journal ISSN
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Publisher
Journal of Experimental and Theoretical Physics, Springer Link
Abstract
This paper investigates instability ranges of a cylindrically symmetric collapsing cosmic filamentary structure in Brans-Dicke theory of gravity. For this purpose, we use perturbation approach in the modified field equations as well as dynamical equations and construct a collapse equation. The collapse equation with adiabatic index (Γ) is used to explore the instability ranges of both isotropic as well as anisotropic fluid in Newtonian and post-Newtonian approximations. It turns out that the instability ranges depend on the dynamical variables of collapsing filaments. We conclude that the system always remains unstable for 0 < Γ < 1 while Γ > 1 provides instability only for the special case.
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Keywords
Mathematics, Brans-Dicke theory; Instability; Newtonian and post-Newtonian regimes
Citation
Sharif, M., & Manzoor, R. (2016). Instability analysis of a cylindrical stellar object in brans–dicke gravity. Journal of Experimental and Theoretical Physics, 149(5), 849-858. (Rubab Manzoor (Mathematics /SSC), JCR LISTED (IF:0:953))