Relativistic stars in bigravity theory

Katsuki Aoki, Kei Ichi Maeda, Makoto Tanabe

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Assuming static and spherically symmetric spacetimes in the ghost-free bigravity theory, we find a relativistic star solution, which is very close to that in general relativity. The coupling constants are classified into two classes: Class [I] and Class [II]. Although the Vainshtein screening mechanism is found in the weak gravitational field for both classes, we find that there is no regular solution beyond the critical value of the compactness in Class [I]. This implies that the maximum mass of a neutron star in Class [I] becomes much smaller than that in general relativity (GR). On the other hand, for the solution in Class [II], the Vainshtein screening mechanism works well even in a relativistic star and the result in GR is recovered.

Original languageEnglish
Article number064054
JournalPhysical Review D
Volume93
Issue number6
DOIs
Publication statusPublished - 2016 Mar 22

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Relativistic stars in bigravity theory'. Together they form a unique fingerprint.

Cite this