Hybrid protoneutron stars with the MIT bag model

Abstract

We study the hadron-quark phase transition in the interior of protoneutron stars. For the hadronic sector, we use a microscopic equation of state involving nucleons and hyperons derived within the finite-temperature Brueckner-Bethe-Goldstone many-body theory, with realistic two-body and three-body forces. For the description of quark matter, we employ the MIT bag model both with a constant and a density-dependent bag parameter. We calculate the structure of protostars with the equation of state comprising both phases and find maximum masses below 1.6 solar masses. Metastable heavy hybrid protostars are not found.

12 pages, 9 figures submitted to Phys. Rev. D

References in corpus (1)

• Evolutionary sequences of rotating protoneutron stars

Cited by in corpus (6)

• Hadron-quark mixed phase in hyperon stars
• Astrophysical Implications of Equation of State for Hadron-Quark Mixed Phase: Compact Stars and Stellar Collapses
• Deconfinement phase transition in hybrid neutron stars from the Brueckner theory with three-body forces and a quark model with chiral mass scaling
• A new possible quark-hadron mixed phase in protoneutron stars
• Structure of hybrid protoneutron stars within the Nambu--Jona-Lasinio model
• Quark matter influence on observational properties of compact stars