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arXiv 1904.04570astro-ph.HEgr-qc
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脉冲星壳震引起的引力波爆发

Bursts of Gravitational Waves due to Crustquake from Pulsars

Biswanath Layek, Pradeepkumar Yadav

摘要:

本文探讨了壳震的一种可能后果,即由于壳震引起的形变脉冲星四极矩突变而产生的引力波爆发。旋转中子星壳震的发生对中子星动力学有着重要的影响。我们认为,如果脉冲星经历了壳震,那么全球Ws爆发的产生是壳震的必然结果。我们估计的应变振幅($h_0$),这样的爆发的GWs和比较的应变振幅GWs在各种其他情况下产生的孤立的millars在文献中提出的。我们得到的值与这些建议相当。我们还估计了这种突发的特征应变($h_c$)和信噪比(SNR)的数量级。对于奇异夸克星,应变振幅可能会成倍增强,这使得夸克星可能成为地壳地震的引力波源。这种波的缺乏可能会对这些假设的恒星产生限制

英文摘要:

We explore here a possible consequence of crustquake, namely, the generation of bursts of gravitational waves (GWs) due to a sudden change in the quadrupole moment (QM) of a deformed pulsar as a result of crustquake. The occurrence of crustquake in a rotating neutron star can play many important roles in neutron star (NS) dynamics. Here we propose that if a pulsar undergoes crustquake, then the generation of bursts of GWs is an inevitable consequence of crustquake. We have estimated the strain amplitudes ($h_0$) for such bursts of GWs and compared with the strain amplitudes for GWs produced in various other scenarios for isolated pulsars as suggested earlier in the literature. The values we obtain are comparable to those suggestions. We also estimate the order of magnitude for characteristic strain ($h_c$) and signal to noise ratio (SNR) for such bursts. For exotic quarks stars, a multifold enhancement of strain amplitudes is expected, which makes quark stars a potential source of gravitational waves as a result of crustquake. The absence of such waves may put constraints on such hypothetical stars

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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