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A&A 451, 213-222 (2006)
DOI: 10.1051/0004-6361:20053670
Protoneutron stars within the Brueckner-Bethe-Goldstone theory
O. E. Nicotra, M. Baldo, G. F. Burgio and H.-J. SchulzeIstituto Nazionale di Fisica Nucleare, Sezione di Catania, and Dipartimento di Fisica, Universitá di Catania, via S. Sofia 64, 95123 Catania, Italy
e-mail: fiorella.burgio@ct.infn.it
(Received 21 June 2005 / Accepted 5 January 2006)
Abstract
We study the structure of newly born neutron stars (protoneutron stars)
within the finite temperature Brueckner-Bethe-Goldstone theoretical approach
also including hyperons.
We find that for purely nucleonic stars both finite temperature and
neutrino trapping reduce the value of the maximum mass.
For hyperonic stars the effect is reversed,
because neutrino trapping
shifts the appearance of hyperons to larger baryon density
and considerably stiffens the equation of state.
Key words: dense matter -- equation of state -- stars: interiors -- stars: neutron
© ESO 2006
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