Hadronic and Quark Matter – Applications in AstrophysicsNo Access

STABILITY OF NEUTRON STARS WITH LARGE AMOUNT OF STRANGENESS AND THE ROLE OF δ-MESON

Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS, 91501-970, Brazil

Also Universidade de Caxias do Sul – UCS, Caxias do Sul, RS, Brazil.

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A. MESQUITA

Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS, 91501-970, Brazil

Also Universidade de Caxias do Sul – UCS, Caxias do Sul, RS, Brazil.

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C. A. Z. VASCONCELLOS

Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS, 91501-970, Brazil

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B. E. J. BODMANN

Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS, 91501-970, Brazil

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M. DILLIG

Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS, 91501-970, Brazil

Permanent address: Institut für Theoretisch Physik III, Universität Erlangen-Nürnberg, Staudtstraβe 7, Erlangen, D-91058, Germany.

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, and

G. F. MARRANGHELLO

Universidade Fedral de Pelotas, Campus Bagé, Rua Carlos Barbosa, SN, Bage, RS, 96400-970, Brazil

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https://doi.org/10.1142/S0218301307008574Cited by:3 (Source: Crossref)

Abstract

We investigate the role of the strange σ*, ϕ and δ meson fields on the delineation of main properties of neutron stars using a parameterized Lagrangian density model in the effective baryon and meson sectors. We assume, strange quarks are localized within the hyperon fields, which carry the strangeness content of the model. Our main goal is to analyze stability conditions of neutron stars with large amount of strangeness per baryon. Our main result indicates the inclusion of the strange (anti-)quark containing meson field σ*, besides ϕ and δ into nuclear matter, turn the equation of state stiffer this way increasing the gravitational mass of the neutron star.

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