Energy release from hadron-quark phase transition in neutron stars and the axial $w$-mode of gravitational waves
Energy release from hadron-quark phase transition in neutron stars and the axial $w$-mode of gravitational waves
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DOI：
10.1103/physrevc.83.045802
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发表时间：
2010-11
影响因子：
3.1
通讯作者：
Weikang Lin;Bao-An Li;Jun Xu;C. Ko;Dehua Wen
中科院分区：
文献类型：
--
作者：
Weikang Lin;Bao-An Li;Jun Xu;C. Ko;Dehua Wen
分别在重子八重态和MIT袋模型下描述了具有同位旋和动量相关有效相互作用的中子星的超声波相和夸克相，并利用Gibbs条件构造了混合相，研究了中子星星由于强子-夸克相变而释放的能量.此外，还研究了超星和混合星的第一轴向w模引力波的频率和阻尼时间。我们发现，能量释放是更敏感的袋常数比密度依赖的核对称性能量。此外，w模式的频率被发现是显着不同的强子-夸克相变和强烈依赖于袋常数的值。核对称能的密度依赖性的影响变得重要，但是，大值的袋常数，导致更高的强子-夸克跃迁密度。
Describing the hyperonic and quark phases of neutron stars with an isospin- and momentum-dependent effective interaction for the baryon octet and the MIT bag model, respectively, and using the Gibbs conditions to construct the mixed phase, we study the energy release from a neutron star owing to the hadron-quark phase transition. Moreover, the frequency and damping time of the first axial w mode of gravitational waves are studied for both hyperonic and hybrid stars. We find that the energy release is much more sensitive to the bag constant than the density dependence of the nuclear symmetry energy. Also, the frequency of the w mode is found to be significantly different with or without the hadron-quark phase transition and depends strongly on the value of the bag constant. Effects of the density dependence of the nuclear symmetry energy become, however, important for large values of the bag constant that lead to higher hadron-quark transition densities.