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Polytropic spheres in Palatini f(R) gravity

Published online by Cambridge University Press:  30 September 2008

A. Oscoz ,
E. Mediavilla ,
M. Serra-Ricart ,
E. Barausse ,
T.P. Sotiriou  and
J.C. Miller
E. Barausse
Affiliation:
SISSA, International School for Advanced Studies, via Beirut 2-4, 34014 Trieste, Italy and INFN, Sezione di Trieste
T.P. Sotiriou
Affiliation:
SISSA, International School for Advanced Studies, via Beirut 2-4, 34014 Trieste, Italy and INFN, Sezione di Trieste Department of Physics, University of Maryland, College Park, MD 20742-4111, USA
J.C. Miller
Affiliation:
SISSA, International School for Advanced Studies, via Beirut 2-4, 34014 Trieste, Italy and INFN, Sezione di Trieste Department of Physics (Astrophysics), University of Oxford, Oxford, UK
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Abstract

We examine static spherically symmetric polytropic spheres inPalatini f(R) gravity and show that no regular solutions to thefield equations exist for physically relevant cases such as amonatomic isentropic gas or a degenerate electron gas, thus castingdoubt on the validity of Palatini f(R) gravity as an alternative toGeneral Relativity.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 30: Spanish Relativity Meeting - Encuentros Relativistas Españoles, ERE2007: Relativistic Astrophysics and Cosmology , 2008 , pp. 189 - 192
Copyright
© EAS, EDP Sciences, 2008

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References

Barausse, E., Sotiriou, T.P., & Miller, J.C., 2007 [arXiv:gr-qc/0703132]
Barausse, E., Sotiriou, T.P., & Miller, J.C., in preparation
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Sotiriou, T.P., 2006, Class. Quant. Grav., 23, 1253 CrossRef
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