Entropy of gravitationally collapsing matter in FRW universe models

Morad Amarzguioui and Øyvind Grøn
Phys. Rev. D 71, 083011 – Published 14 April 2005

Abstract

We look at a gas of dust and investigate how its entropy evolves with time under a spherically symmetric gravitational collapse. We treat the problem perturbatively and find that the classical thermodynamic entropy does actually increase to first order when one allows for gravitational potential energy to be transferred to thermal energy during the collapse. Thus, in this situation there is no need to resort to the introduction of an intrinsic gravitational entropy in order to satisfy the second law of thermodynamics.

  • Figure
  • Figure
  • Figure
  • Received 18 February 2005

DOI:https://doi.org/10.1103/PhysRevD.71.083011

©2005 American Physical Society

Authors & Affiliations

Morad Amarzguioui*

  • Institute for Theoretical Astrophysics, University of Oslo, PO Box 1029 Blindern, 0315 Oslo, Norway

Øyvind Grøn

  • Oslo College, Faculty of Engineering, Cort Adelersgt. 30, 0254 Oslo, Norway
  • Department of Physics, University of Oslo, PO Box 1048 Blindern, 0316 Oslo, Norway

  • *Electronic address: morad@astro.uio.no
  • Electronic address: oyvind.gron@iu.hio.no

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 71, Iss. 8 — 15 April 2005

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×