Abstract
Perturbed Einstein’s equations with a linear response relation and a stochastic source, applicable to a relativistic star model are worked out. These perturbations which are stochastic in nature, are of significance for building a non-equilibrium statistical mechanics theory in connections with relativistic astrophysics. A fluctuation dissipation relation for a spherically symmetric star in its simplest form is obtained. The FD relation shows how the random velocity fluctuations in the background of the unperturbed star can dissipate into Lagrangian displacement of fluid trajectories of the dense matter. Interestingly in a simple way, a constant (in time) coefficient of dissipation is obtained without a delta correlated noise. This formalism is also extended for perturbed TOV equations which have a stochastic contribution, and show up in terms of the effective or root mean square pressure perturbations. Such contributions can shed light on new ways of analysing the equation of state for dense matter. One may obtain contributions of first and second order in the equation of state using this stochastic approach.
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13 October 2023
A Correction to this paper has been published: https://doi.org/10.1007/s10714-023-03164-x
References
Friedman, J.L.: Astro. J. 200, 204–220 (1975)
Kokkotas, K.D., Ruoff, J.: A &A 366(2), 565–572 (2001)
Jackson, J.C.: Mon. Not. R Astron. Soc. 276, 965–970 (1995)
Gabrielle, A., et al.: Phys. Rev. D 58, 124012 (1998)
Andersson, Nils, et al.: Mon. Not. Roy. Astron. Soc. 274, 1039 (1995)
Andersson, N., Kokkotas, K.D., Schutz, B.F.: Mon. Not. R Astron. Soc. 205, 1230–1234 (1996)
Satin, S.: Gen. Rel. Grav. 50, 97 (2018)
Satin, Seema: Gen. Rel. Grav. 51, 52 (2019)
Satin, S.: CQG (2023). arXiv:2110.01837v1 (accepted)
Hu, B.L., Verdaguer, E.: Liv. Rev. Relative. 11(1), 1–12 (2008)
Hu, B.L., Matacz, A.: Phys. Rev. D 51, 1577 (1995)
Sinha, S., Raval, A., Hu, B.L.: Found. Phys. 33(1), 37–64 (2003)
Chandrashekhar, S.: Rev. Mod. Phys. 15(1), 265 (1943)
Risken, H.: The Fokker Planck Equation, 2nd edn. Springer, New York (1989)
Satin, S.: CQG 39(9), 095004 (2022)
Toda, M., Kubi, R., Saito, N.: Statisitical Physics 1: Equilibirum Statistical Mechanics. Springer Series in Solid State Sciences (SSSOL), vol. 30 (1983)
Satin, S.: Phys. Rev. D 100, 044032 (2019)
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Satin, S. Formalism for stochastic perturbations and analysis in relativistic stars. Gen Relativ Gravit 55, 37 (2023). https://doi.org/10.1007/s10714-023-03084-w
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DOI: https://doi.org/10.1007/s10714-023-03084-w