arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.07147astro-ph.HEgr-qc
收藏

超大质量恒星坍缩到超大质量黑洞的引力波

Gravitational waves from supermassive stars collapsing to a supermassive black hole

Masaru Shibata, Yuichiro Sekiguchi, Haruki Uchida, Hideyuki Umeda

摘要:

在轴对称数值相对论模拟中,我们从一个快速旋转的超大质量恒星(SMS)核心的坍缩中推导出引力波形,该坍缩直接导致超大质量黑洞(SMBH)的种子。我们发现,在黑洞形成过程中发射的引力波的峰值应变振幅是$\approx 5 \times 10^{-21}$在频率$f \approx 5$ \,mHz的宇宙学红移$z=3$的事件,如果崩溃的SMS核心是在氢燃烧阶段。如果灵敏度与$f=1$的LISA一样高-10 mHz,则这种引力波将可由具有信噪比$\approx 10$的eLISA等空间激光干涉探测器探测到。引力波信号的探测将为测试SMBH种子形成的直接塌陷场景提供潜在的机会。

英文摘要:

We derive the gravitational waveform from the collapse of a rapidly rotating supermassive star (SMS) core leading directly to a seed of a supermassive black hole (SMBH) in axisymmetric numerical-relativity simulations. We find that the peak strain amplitude of gravitational waves emitted during the black-hole formation is $\approx 5 \times 10^{-21}$ at the frequency $f \approx 5$\,mHz for an event at the cosmological redshift $z=3$, if the collapsing SMS core is in the hydrogen-burning phase. Such gravitational waves will be detectable by space laser interferometric detectors like eLISA with signal-to-noise ratio $\approx 10$, if the sensitivity is as high as LISA for $f=1$--10\,mHz. The detection of the gravitational-wave signal will provide a potential opportunity for testing the direct-collapse scenario for the formation of a seed of SMBHs.

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。

↑