论文标题
来自大型年轻子和超级Chandrasekhar白色矮人的R模式不稳定性的重力波
Gravitational waves from r-mode instability of massive young sub- and super-Chandrasekhar white dwarfs
论文作者
论文摘要
在目前的工作中，我们研究了R模式不稳定性窗口，在具有电子气体和磁制动的Landau量化的情况下，亚和超级智力和超级chandrasekhar磁化的白色矮人磁化。还计算了由于R模式不稳定性引起的重力波应变振幅。主要的阻尼机制被认为是由于离子液体散射的脱位粘度而产生的剪切粘度。我们发现，Landau的临界频率量化磁化的白色矮人是最低的，非Landau量化的焦点较高的频率较高，而非磁性化的白矮星的频率是同一温度下的最高频率。这意味着磁制动和Landau量化都增强了R模式的不稳定性。我们还看到，由于额外的磁制动术语，磁性白色矮人迅速呈现，但Landau量化对与白色矮人内部相关的磁场强度的磁场强度没有相当大的影响。我们发现，对于1 kpc的快速旋转的超级chandrasekhar白色矮人的R模式引力波应变振幅为$ \ sim 10^{ - 27} $，使孤立的大规模迅速旋转的热磁化热磁化的白矮人在将来搜索重力浪潮。
In the present work we investigate the r-mode instability windows, spindown and spindown rates of sub- and super-Chandrasekhar magnetized white dwarfs in presence of Landau quantization of the electron gas and magnetic braking. The gravitational wave strain amplitudes due to r-mode instability is also calculated. The dominant damping mechanism is taken to be the shear viscosity arising due to scattering of the degenerate electrons from the ion liquid. We find that the critical frequencies of Landau quantized magnetized white dwarfs are the lowest, those of non-Landau quantized ones are higher and those of non-magnetized ones are the highest at the same temperature. This implies that magnetic braking and Landau quantization both enhance r-mode instability. We have also seen that there is rapid spindown of magnetized white dwarfs due to additional magnetic braking term but there is no considerable effect of Landau quantization on the spindown and spindown rates for magnetic field strengths relevant for white dwarf interiors. We find that the r-mode gravitational wave strain amplitude for a rapidly rotating super-Chandrasekhar white dwarf at 1 kpc is $\sim 10^{-27}$, making isolated massive rapidly rotating hot magnetized white dwarfs prime candidates for search of gravitational waves in the future.
