Compact stars on the brane: What could they reveal about extra dimensions?

G. Lugones, J. D.V. Arbañil

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this work we investigate the properties of compact stars in the Randall-Sundrum type II brane-world model. We analyze the properties of quark and hadronic stars using the MIT bag model and a relativistic mean-field model for the equation of state. We show that the causality limit in brane-world models coincides with the Schwarzschild limit. Hence, there is a region in the mass-radius plane that is forbidden in General Relativity for causal equations of state but can be accessed within brane-world models. We also show that stable compact stars of arbitrarily large mass are possible because they can be supported against collapse by the non-local bulk effects on the brane. This features provide a potential test for the existence of extra dimensions through the observation of neutron star's masses and radii.

Original languageEnglish
Pages (from-to)876-879
Number of pages4
JournalAstronomische Nachrichten
Issue number8-9
StatePublished - Nov 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
Copyright © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • dense matter
  • equation of state
  • general relativity
  • stars: neutron


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