Isothermal vs. isentropic description of protoneutron stars in the Brueckner-Bethe-Goldstone theory

Details Isothermal vs. isentropic description of protoneutron stars in the Brueckner-Bethe-Goldstone theory Isothermal vs. isentropic description of protoneutron stars in the Brueckner-Bethe-Goldstone theory

2009-01-12

arxiv.org/abs/0901.1527v1

Phys.Atom.Nucl.72:1197-1202,2009

Physics

Nuclear Physics

Nuclear Theory

12pages, 4 figures, to be published in a special issue of "Physics of Atomic Nuclei" devoted to the 85th birthday of S. Belyae

Scientific paper

10.1134/S1063778809070126

We study the structure of hadronic protoneutron stars within the finite temperature Brueckner-Bethe-Goldstone theoretical approach. Assuming beta-equilibrated nuclear matter with nucleons and leptons in the stellar core, with isothermal or isentropic profile, we show that particle populations and equation of state are very similar. As far as the maximum mass is concerned, we find that its value turns out to be almost independent on T, while a slight decrease is observed in the isentropic case, due to the enhanced proton fraction in the high density range.

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