Stellar Stability in the Braneworld

10th Workshop of the Gravitation and Mathematical Physics Division, Mexican Physical Society

物理学;数学

Linares, Francisco^1 ; García-Aspeitia, Miguel A.^1 ; Ureña-López, L. Arturo^1

Departamento de Física, Campus León, Universidad de Guanajuato, León-Guanajuato

37150, Mexico^1

关键词: Energy density;    General Relativity;    Local terms;    Neutron stars;    Stellar stability;    Tolman-Oppenheimer-Volkoff equation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/545/1/012007/pdf
DOI  :  10.1088/1742-6596/545/1/012007

来源: IOP

【 摘 要 】

We study the properties of astrophysical systems in a Brane World scenario. In particular, the consequences of local terms that emerge from extra-dimensional gravity are explored through the modified Tolman-Oppenheimer-Volkoff equation. We compute the induced changes into mass, density and compactness of objects like white dwarfs and neutron stars. The main corrections in comparison with the known results of General Relativity are given in terms of the ratio ρ0/λ, where ρ0is the central energy density of the stellar distribution and λ is the brane tension. As a result of these modifications, We obtain that the compactness of both, neutron stars and white dwarf decreases with respect to the value of General Relativity.