Quark core of protoneutron stars in the phase diagram of quark matter
- Department of Physics, Luleaa University of Technology, SE-97187 Luleaa (Sweden)
- Instytut Fizyki Teoretycznej, Uniwersytet Wroclawski, PL-50-204 Wroclaw (Poland)
We study the effect of neutrino trapping in newborn quark stars within a three-flavor Nambu-Jona-Lasinio 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{sup 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 state. High temperatures and/or neutrino chemical potentials disfavor configurations with a color-flavor-locked phase. Stable quark star solutions with color-flavor-locked cores exist only at low temperatures and neutrino chemical potentials.
- OSTI ID:
- 20933332
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 12; Other Information: DOI: 10.1103/PhysRevD.75.125013; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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