Effect of hyperonic three-body forces on the maximum mass of neutron stars

A model based on a microscopic Brueckner–Hartree–Fock approach of hyperonic matter supplemented with additional simple phenomenological density-dependent contact terms is employed to estimate the effect of hyperonic three-body forces on the maximum mass of neutron stars. Our results show that althou...

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Published inJournal of physics. Conference series Vol. 342; no. 1; pp. 12006 - 8
Main Authors Logoteta, D, Vidaña, I, Providência, C, Polls, A, Bombaci, I
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2012
Subjects
Compatibility
Contact
Estimates
Millisecond pulsars
Neutron stars
Neutrons
Physics
Stars
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Summary:A model based on a microscopic Brueckner–Hartree–Fock approach of hyperonic matter supplemented with additional simple phenomenological density-dependent contact terms is employed to estimate the effect of hyperonic three-body forces on the maximum mass of neutron stars. Our results show that although hyperonic three-body forces can reconcile the maximum mass of hyperonic stars with the current limit of 1.4 – 1.5M⊙, they are unable to provide the repulsion needed to make the maximum mass compatible with the observation of massive neutron stars, such as the recent measurements of the unusually high masses of the millisecond pulsars PSR J1614-2230 (1.97 ± 0.04M⊙) and PSR J1903+0327 (1.667 ± 0.021M⊙).
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ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/342/1/012006