Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-02-03
Proc. of the KIAS-APCTP Int. Symp. on Astro-Hadron Physics "Compact Stars: The Quest for New States of Dense Matter" (World Sc
Astronomy and Astrophysics
Astrophysics
10 pages, 6 figures (8 ps files and 3 epsi files), rotating_pr.sty and ws-procs9x6.cls files. Submitted for the Conference Pro
Scientific paper
An equation of state for 2-flavor quark matter (QM) with diquark condensation under the conditions for compact stars -$\beta$-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 $\mu_{\bar \nu_e}^c$. The following consequences are presented: 1) The star develops a 2-phase structure ($\mu_{\bar \nu_e}\geq \mu_{\bar \nu_e}^c$): 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.
Aguilera Deborah N.
Blaschke David
Grigorian Hovik
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