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The quark core of protoneutron stars in the phase diagram of quark matter

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arxiv astro-ph/0701772 v2 pith:XJO5FQIQ submitted 2007-01-26 astro-ph hep-phnucl-th

The quark core of protoneutron stars in the phase diagram of quark matter

classification astro-ph hep-phnucl-th
keywords quarkneutrinostarsphasechemicalcoresmatterpotentials
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the effect of neutrino trapping in new-born quark stars within a three-flavor Nambu - Jona-Lasinio (NJL) model with self-consistently calculated quark masses. The phase diagrams and equations of state for charge neutral quark matter in beta-equilibrium are presented, with and without trapped neutrinos. The compact star sequences for different neutrino untrapping scenarios are investigated and the energy release due to neutrino untrapping is found to be of the order of 10^53 erg. We find that hot quark stars characterized, e.g., by an entropy per baryon of 1-2 and a lepton fraction of 0.4, as models for the cores of newborn protoneutron stars, are in the two-flavor color superconducting (2SC) state. High temperatures and/or neutrino chemical potentials disfavor configurations with a color-flavor-locked (CFL) phase. Stable quark star solutions with CFL cores exist only at low temperatures and neutrino chemical potentials.

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  1. The petit four of color-superconducting phases in proto-neutron star evolution

    nucl-th 2026-07 conditional novelty 6.0

    Along constant-baryon-number cooling tracks, color-superconducting cores in proto-neutron stars follow four scenarios, with stable cold CSC only in a narrow high-mass band for the chosen EoS.