Equilibrium and stability of strange anisotropic stars

José D.V. Arbañil; Manuel Malheiro

doi:10.1142/9789813226609_0148

Equilibrium and stability of strange anisotropic stars

José D.V. Arbañil, Manuel Malheiro

Grupo de física teórica

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The equilibrium and stability of anisotropic strange stars is analyzed. For this purpose, we consider that the anisotropy factor follows the equation σ = k pr(1 − e^−λ); being k a constant, pr the radial pressure and e^−λ a metric function. We found that the anisotropy yields considerable changes in some macroscopic properties of strange stars. Despite this, such as is determined in isotropic strange stars, the onset of the instability is marked by the maximum mass point. This indicates that stable and unstable equilibrium configurations can be recognize through the conditions dM/dρc > 0 and dM/dρc < 0, respectively.

Original language	English
Title of host publication	14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings
Editors	Massimo Bianchi, Robert T Jantzen, Remo Ruffini, Remo Ruffini
Publisher	World Scientific
Pages	1571-1575
Number of pages	5
ISBN (Electronic)	9789813226593
DOIs	https://doi.org/10.1142/9789813226609_0148
State	Published - 2018
Event	14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Rome, Italy Duration: 12 Jul 2015 → 18 Jul 2015

Publication series

Name	14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings

Conference

Conference	14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories
Country/Territory	Italy
City	Rome
Period	12/07/15 → 18/07/15

Bibliographical note

Funding Information:
J.D.V.A. would like to thank Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES, Brazil, for a grant. M. M. thanks Fundação de Amparo à Pesquisa do São Paulo for financial support under the thematic Project 13/26258−4.

Funding Information:
J.D.V.A. would like to thank Coordena¸cão de Aperfeic¸oamento de Pessoal de Ńıvel Superior - CAPES, Brazil, for a grant. M. M. thanks Fundac¸ão de Amparo à Pesquisa do São Paulo for financial support under the thematic Project 13/26258−4.

Publisher Copyright:
Copyright © 2018 by the Editors.All rights reserved.

Keywords

Compact stars
Stability
Structure

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10.1142/9789813226609_0148

Cite this

Arbañil, J. D. V., & Malheiro, M. (2018). Equilibrium and stability of strange anisotropic stars. In M. Bianchi, R. T. Jantzen, R. Ruffini, & R. Ruffini (Eds.), 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings (pp. 1571-1575). (14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings). World Scientific. https://doi.org/10.1142/9789813226609_0148

Arbañil, José D.V. ; Malheiro, Manuel. / Equilibrium and stability of strange anisotropic stars. 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings. editor / Massimo Bianchi ; Robert T Jantzen ; Remo Ruffini ; Remo Ruffini. World Scientific, 2018. pp. 1571-1575 (14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings).

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Arbañil, JDV & Malheiro, M 2018, Equilibrium and stability of strange anisotropic stars. in M Bianchi, RT Jantzen, R Ruffini & R Ruffini (eds), 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings. 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings, World Scientific, pp. 1571-1575, 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Rome, Italy, 12/07/15. https://doi.org/10.1142/9789813226609_0148

Equilibrium and stability of strange anisotropic stars. / Arbañil, José D.V.; Malheiro, Manuel.

14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings. ed. / Massimo Bianchi; Robert T Jantzen; Remo Ruffini; Remo Ruffini. World Scientific, 2018. p. 1571-1575 (14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - The equilibrium and stability of anisotropic strange stars is analyzed. For this purpose, we consider that the anisotropy factor follows the equation σ = k pr(1 − e−λ); being k a constant, pr the radial pressure and e−λ a metric function. We found that the anisotropy yields considerable changes in some macroscopic properties of strange stars. Despite this, such as is determined in isotropic strange stars, the onset of the instability is marked by the maximum mass point. This indicates that stable and unstable equilibrium configurations can be recognize through the conditions dM/dρc > 0 and dM/dρc < 0, respectively.

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Arbañil JDV, Malheiro M. Equilibrium and stability of strange anisotropic stars. In Bianchi M, Jantzen RT, Ruffini R, Ruffini R, editors, 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings. World Scientific. 2018. p. 1571-1575. (14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings). doi: 10.1142/9789813226609_0148

Equilibrium and stability of strange anisotropic stars

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Bibliographical note

Keywords

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