脉动中子星中超流模与简正模的解耦
Decoupling of superfluid and normal modes in pulsating neutron stars
摘要：
我们证明了控制超流中子星脉动的方程可以分裂成两组弱耦合方程，一组描述超流模，另一组描述正常模。对于实际的状态方程，耦合参数s很小，|s| ~ 0.01-0.05。s=0的近似值已经足以在几个单位的精度内计算脉动谱。我们的研究结果表明，特别是，发射的引力波从超流脉动模式相比，从正常模式被抑制。所提出的方法可以大大简化建模的脉动超流中子星。
英文摘要：
We show that equations governing pulsations of superfluid neutron stars can be splitted into two sets of weakly coupled equations, one describing the superfluid modes and another one -- the normal modes. The coupling parameter s is small, |s| ~ 0.01-0.05, for realistic equations of state. Already an approximation s=0 is sufficient to calculate the pulsation spectrum within the accuracy of a few percents. Our results indicate, in particular, that emission of gravitational waves from superfluid pulsation modes is suppressed in comparison to that from normal modes. The proposed approach allows to drastically simplify modeling of pulsations of superfluid neutron stars.
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