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Energy release due to antineutrino untrapping from hot quark stars

D. N. Aguilera·D. Blaschke·H. Grigorian
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Abstract

An equation of state for 2-flavor quark matter (QM) with diquark condensation under the conditions for compact stars -$β$-equilibrium, charge and color neutrality- is presented. Trapped antineutrinos prevent the formation of the diquark condensate at moderate densities above a critical value of the antineutrino chemical potential $μ_{\bar ν_e}^c$. The following consequences are presented: 1) The star develops a 2-phase structure ($μ_{\bar ν_e}\geq μ_{\bar ν_e}^c$): a color superconducting QM core and a normal QM shell. 2)During the cooling, when the temperature is small enough ($T<1$ MeV) the antineutrino mean free path becomes larger than the thickness of the normal QM shell and the antineutrinos get untrapped in a sudden burst. The energy release is estimated as $\simeq 10^{52}$ erg and an antineutrino pulse is expected to be observed.

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D. N. Aguilera, D. Blaschke, H. Grigorian. 2004-02-03. Energy release due to antineutrino untrapping from hot quark stars. https://doi.org/10.1142/9789812702524_0031

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