Energy release due to antineutrino untrapping and diquark condensation in hot quark star evolution
Energy release due to antineutrino untrapping and diquark condensation in hot quark star evolution
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热夸克恒星演化中反中微子解俘获和双夸克凝聚导致的能量释放
DOI：
10.1051/0004-6361:20031742
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发表时间：
2002
影响因子：
6.5
通讯作者：
H. Grigorian
中科院分区：
文献类型：
--
作者：
D. Aguilera;D. Blaschke;H. Grigorian
我们研究了在可能存在双夸克凝聚的夸克星星组态中，反中微子在热夸克物质中被俘获的后果。由于电荷中性和β平衡的条件，味不对称性随着被俘获反中微子的数密度而增加。当反中微子化学势超过30兆电子伏的临界值时，双夸克凝聚在低密度时被抑制，出现两相结构：超导夸克物质核心被正常夸克物质外壳包围。当夸克星星冷却到T \sim 1$ MeV以下时，反中微子的平均自由程变得比正常夸克物质壳层的厚度大，因此它们突然变得不受束缚。通过比较重子数相同的组态的质量，我们估计反中微子解俘获跃迁释放的能量可达1051 - 1052 erg。
We study the consequences of antineutrino trapping in hot quark matter for quark star configurations with possible diquark condensation. Due to the conditions of charge neutrality and β -equilibrium the flavor asymmetry increases with the number density of trapped antineutrinos. Above a critical value of the antineutrino chemical potential of 30 MeV, diquark condensation is inhibited at low densities and a two-phase structure emerges: a superconducting quark matter core surrounded by a shell of normal quark matter. When the quark star cools below a temperature $T \sim 1$ MeV, the mean free path of antineutrinos becomes larger than the thickness of the normal quark matter shell so that they become suddenly untrapped. By comparing the masses of configurations with the same baryon number we estimate that the release of energy due to the antineutrino untrapping transition can be in the range of 10 51 –10 52 erg.