论文标题
双白矮人合并残余的Decihertz重力波
Decihertz gravitational waves from double white dwarf merger remnants
论文作者
论文摘要
通过发射引力波（GW），双白色矮人（DWDS）的封闭二进制物和合并。这些二进制文件中的某些轨道运动有望通过GW的太空激光干涉探测器在低频带上观察到。合并残留物可能会遭受热核失控的逃亡，如果它们足够大，则爆炸为IA型超新星。随着GW消息来源，迄今为止的残留物几乎没有被研究。在这里，我们提出了一种新的DWD合并残留物GW发射机制，该机制可以由Decihertz频带中的GW探测器观察到，该机制可以观察到。由于合并过程，暂时期望残留物具有高度的差异旋转。然后，它与振荡模式不稳定，其方位模式速度与恒星旋转一致。我们解决了差异旋转残余物的本本特征问题，并识别可能分类为惯性模式的不稳定本本特征。 GW的特征应变的估计表明，通过针对Decihertz频带的计划重力波观测站，可以在处女座簇的距离内检测到它们。
Close binaries of double white dwarfs (DWDs) inspiral and merge by emitting gravitational wave (GW). Orbital motion of some of these binaries are expected to be observed at low frequency band by space-borne laser interferometric detectors of GW. The merger remnant may suffer thermonuclear runaway and explode as type Ia supernova if they are massive enough. As GW sources the remnants have so far been scarcely studied. Here we propose a new mechanism of GW emission from DWD merger remnants which may be observed by planned GW detectors in decihertz frequency band. A remnant is temporarily expected to have a high degree of differential rotation as a consequence of merger process. It is then unstable to oscillation modes whose azimuthal pattern speed coincides with the stellar rotation. We solve eigenvalue problem of differentially rotating remnants and identify unstable eigenmodes which may be categorized to inertial modes. The estimate of characteristic strain of GW shows that they may be detectable within the distance of the Virgo cluster by planned gravitational wave observatories targeting the decihertz band.
