arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2301.01804astro-ph.HEgr-qc
收藏

来自潮汐瓦解事件的引力波透镜效应

Lensing of gravitational waves from tidal disruption events

Martina Toscani, Elena M. Rossi, Nicola Tamanini, Giulia Cusin

AI总结:

本研究通过半解析与射线追踪结合的混合方法建模透镜分布,探究引力透镜对潮汐瓦解事件引力波信号的影响,发现DECIGO十年观测可探测到一定数量强透镜TDEs,为分赫兹引力波多信使研究提供参考并指出数据分析技术需求。

摘要:

在本研究中,我们探究了引力透镜效应对一类潮汐瓦解事件(TDEs)的引力波(GW)信号的影响。我们估算了预期可由未来天基引力波天文台(尤其是LISA和DECIGO)探测到的、经透镜放大的信号数量。我们采用一种混合方法对透镜分布进行建模,该方法将半解析方法与射线追踪模拟的数值结果相结合。我们将TDE群体分为两类:核TDEs(主序星被星系核心的大质量黑洞潮汐瓦解)和球状星团TDEs(白矮星被球状星团中的中等质量黑洞潮汐瓦解)。我们发现,即便考虑透镜效应,LISA也无法观测到任何TDEs;而在10年的观测周期内,DECIGO可探测到约16个强透镜(放大倍率μ>2)的球状星团TDEs,以及约135个强透镜的核TDEs。我们的结果揭示了透镜效应在未来分赫兹引力波天文台中将发挥的作用,既指出了TDEs带来的令人兴奋的多信使研究机遇,同时也表明需要开发合适的数据分析技术,以正确重建源的天体物理性质。

英文摘要:

In this work, we investigate the effect of gravitational lensing on the gravitational wave (GW) signals of a population of tidal disruption events (TDEs). We estimate the number of lensed-magnified signals that we expect to detect with future space-based GW observatories, in particular LISA and DECIGO. We model the lens distribution using an hybrid approach that combines semi-analytic methods with numerical results from ray tracing simulations. We divide the TDE population in two classes, nuclear TDEs (main sequence stars tidally disrupted by massive black holes in the cores of galaxies) and globular TDEs (white dwarfs tidally disrupted by intermediate mass black holes in globular clusters). We find that, even considering the effect of lensing, LISA will not be able to observe any TDEs, while DECIGO could detect $\sim$16 strongly lensed ($μ>2$) globular TDEs and $\sim$135 strongly lensed nuclear TDEs, over an observational period of 10 years. Our results reveal the role that lensing will play in future deci-Hertz GW observatories, indicating exciting multi-messenger opportunities with TDEs but at same time signalling the need to develop adequate data analysis techniques to correctly reconstruct the astrophysical properties of the source.

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。

↑