标题： 通过使用旋进波形测量GWTC-1中双黑洞的偏心率 显示英文标题

标题： Measuring eccentricity of binary black holes in GWTC-1 by using inspiral-only waveform

摘要： 在本文中，我们通过使用旋进-only BBH 波形模板 EccentricFD 估计了 GWTC-1 中的 10 个 BBH 的偏心率。首先，我们用模拟的偏心 BBH 对我们的方法进行了测试。随后我们将该方法应用于真实的 BBH 引力波数据。我们发现 GWTC-1 中的 BBH 除了 GW151226、GW170608 和 GW170729 外，都具有非常小的偏心率。它们在参考频率 10 Hz 下的偏心率上限在 90% 可信区间内从 0.033 到 0.084。对于 GW151226、GW170608 和 GW170729，其上限高于 0.1。GW151226 和 GW170729 的相对较大的偏心率可能是由于忽略了有效自旋和低信噪比，而 GW170608 值得进一步研究。我们还指出了旋进-only 非自旋波形模板在偏心率测量中的局限性。BBH 偏心率的测量有助于理解其形成机制。随着 BBH 引力波事件数量的增加以及更完整的偏心 BBH 波形模板的出现，这将在不久的将来成为一种可行的方法。 显示英文摘要

摘要： 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.