Neutron Stars in Relativistic Mean Field Theory with Isovector Scalar Meson

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dc.creatorKubis, S.
dc.creatorKutschera, M.
dc.creatorStachniewicz, S.
dc.date1998-02-24
dc.date.accessioned2026-07-07T02:26:11Z
dc.date.available2026-07-07T02:26:11Z
dc.descriptionWe study the equation of state of beta-stable dense matter and models of neutron stars in the relativistic mean field theory with the isovector scalar mean field corresponding to the delta-meson [a_0(980)]. A range of values of the delta-meson coupling compatible with the Bonn potentials is explored. Parameters of the model in the isovector sector are constrained to fit the nuclear symmetry energy, E_s=30 MeV. We find that the quantity most sensitive to the delta-meson coupling is the proton fraction of neutron star matter. It increases significantly in the presence of the delta-field. The energy per baryon also increases but the effect is smaller. The equation of state becomes slightly stiffer and the maximum neutron star mass increases for stronger delta-meson coupling.
dc.description16 pages, plain TeX, 6 figs., Acta Physica Polonica B in press
dc.identifierhttps://arxiv.org/abs/astro-ph/9802303
dc.identifierhttp://arxiv.org/abs/astro-ph/9802303
dc.identifierActa Phys.Polon. B29 (1998) 809-822
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12168
dc.subjectAstrophysics
dc.titleNeutron Stars in Relativistic Mean Field Theory with Isovector Scalar Meson
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