论文标题
通过使用仅灵感波形，测量GWTC-1中二进制黑洞的偏心率
Measuring eccentricity of binary black holes in GWTC-1 by using inspiral-only waveform
论文作者
论文摘要
在本文中，我们通过使用只有Inspiral的BBH波形模板cenccentricfd来估计GWTC-1中10 BBH的偏心率。首先，我们使用模拟的偏心BBH测试我们的方法。之后，我们将该方法应用于真实的BBH重力波数据。我们发现，GWTC-1中的BBHS除GW151226，GW170608和GW170729以外的BBH允许偏心率很小。它们对偏心率的上限范围为0.033至0.084，在参考频率10 Hz处的可靠间隔为90％。对于GW151226，GW170608和GW170729，上限高于0.1。 GW151226和GW170729的偏心率相对较大，可能是由于忽略了有效的自旋和低信噪比，而GW170608值得进行随访研究。我们还指出了偏心率测量中仅灵感的非旋转波形模板的局限性。 BBH偏心率的测量有助于理解其形成机制。随着BBH重力波事件的数量增加和更完整的偏心BBH波形模板，这将在不久的将来成为一种可行的方法。
In this paper, we estimate the eccentricity of the 10 BBHs in GWTC-1 by using the inspiral-only BBH waveform template EccentricFD. Firstly, we test our method with simulated eccentric BBHs. Afterwards we apply the method to the real BBH gravitational wave data. We find that the BBHs in GWTC-1 except GW151226, GW170608 and GW170729 admit very small eccentricity. Their upper limits on eccentricity range from 0.033 to 0.084 with 90% credible interval at the reference frequency 10 Hz. For GW151226, GW170608 and GW170729, the upper limits are higher than 0.1. The relatively large eccentricity of GW151226 and GW170729 is probably due to ignoring the effective spin and low signal-to-noise ratio, and GW170608 is worthy of follow-up research. We also point out the limitations of the inspiral-only non-spinning waveform template in eccentricity measurement. The measurement of BBH eccentricity helps to understand its formation mechanism. With the increase in the number of BBH gravitational wave events and the more complete eccentric BBH waveform template, this will become a viable method in the near future.
