arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.11452gr-qc
收藏

带电黑洞并合:轨道圆化和啁啾质量偏差

Charged Black Hole Mergers: Orbit Circularisation and Chirp Mass Bias

Øyvind Christiansen, Jose Beltrán Jiménez, David F. Mota

摘要:

我们考虑带有U(1)荷的黑洞的内旋,U(1)荷不是电磁的,而是对应于某个暗扇区。在弱场、低速区,分量遵循开普勒轨道。我们研究了偶极占主导地位的发射的轨道参数如何演变,并发现轨道很快circularises,虽然没有有效的引力占主导地位的排放。然后,我们考虑圆形轨道,并从携带小电荷的组件中寻找引力波形的修改。考虑到这一点,我们用简化的LIGO噪声填充波形,并对其进行匹配滤波程序,其中模板库仅由不带电的模板组成,重点关注电荷对啁啾质量估计的影响。我们发现一个一致的高估的“广义”啁啾质量,和一个可能的过度和低估的实际啁啾质量。最后,我们简要地考虑双曲线遇到这样的费用的影响,再次发现解释的广义啁啾质量作为实际啁啾质量所产生的偏见。

英文摘要:

We consider the inspiral of black holes carrying U(1) charge that is not electromagnetic, but corresponds to some dark sector. In the weak-field, low-velocity regime, the components follow Keplerian orbits. We investigate how the orbital parameters evolve for dipole-dominated emission and find that the orbit quickly circularises, though not as efficiently as for a gravitationally dominated emission. We then regard circular orbits, and look for modifications in the gravitational waveform from the components carrying small charges. Taking this into account we populate the waveform with simplified LIGO noise and put it through a matched filtering procedure where the template bank only consists of uncharged templates, focusing on the charges' effect on the chirp mass estimation. We find a consistent overestimation of the `generalised' chirp mass, and a possible over- and underestimation of the actual chirp mass. Finally, we briefly consider the effect of such charges on hyperbolic encounters, finding again a bias arising from interpreting the generalised chirp mass as the actual chirp mass.

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。

↑