论文标题
中性和带电双中子星的基本模式特征频
Fundamental-mode eigenfrequencies of neutral and charged twin neutron stars
论文作者
论文摘要
我们研究了快速和缓慢的转化对混合中子星的基本模式特征频的影响，在Hadroonic和Quark Matter（所谓的双星星）之间具有高度不连续的过渡。我们分析了辐射和夸克阶段状态方程的可用参数空间中的一些特征案例。此外，我们还考虑了这些恒星构型被电动带电的可能性。我们的结果表明，对于快速转换下的中性配置，稳定窗口与通常的稳定性标准（即$ \ partial m/\ partial p_c> 0 $）一致，并且两个分支已断开连接。当考虑电荷时，这种不连续性仍然存在，但是通常的标准不足以确定恒星的稳定性。另一方面，缓慢的转换连接最初断开的分支，并增加了混合配置的稳定性窗口。对于这两个转换速度，电荷的存在都会降低本征频率及其稳定窗口的幅度。
We investigate the effects of rapid and slow conversions on the fundamental-mode eigenfrequencies of hybrid neutron stars having highly discontinuous transitions between hadronic and quark matter, the so-called twin stars. We analyze some characteristic cases in the available parameter space of the equations of state for the hadronic and quark phases. Furthermore, we also consider the possibility that these stellar configurations are electrically charged. Our results indicate that for neutral configurations under rapid conversions the stability window coincides with the usual stability criterion, i.e. $\partial M/\partial p_c > 0$ and that the two branches are disconnected. This discontinuity remains when electric charge is considered, but the usual criterion is not sufficient to determine the star's stability. On the other hand, slow conversions connect initially disconnected branches and increase the stability window of the hybrid configurations. For both conversion speeds, the presence of electric charge diminishes the magnitude of the eigenfrequencies and its stability window.
