标题： 通过使用仅旋进波形测量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，我们通过使用仅旋进的BBH波形模板EccentricFD来估计GWTC-1中的10个BBH的偏心率。首先，我们用模拟的偏心BBH测试了我们的方法。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，都几乎具有零偏心率。它们在参考频率10Hz下的偏心率上限在90%可信区间内从0.033到0.084。它们的中位偏心率为0.000。对于GW151226、GW170608和GW170729，上限高于0.1。但它们的中位偏心率分别为0.000、0.064和0.000。我们还指出了仅旋进波形模板在偏心率测量中的局限性。目前GWTC-1的偏心率测量结果不足以约束BBH的形成机制，未来需要更多的观测数据。 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 almost zero eccentricity. Their upper limits on eccentricity rang from 0.033 to 0.084 with 90% credible interval at the reference frequency 10Hz. And their median eccentricities are 0.000. For GW151226, GW170608 and GW170729, the upper limits are higher than 0.1. But the median eccentricities are respectively 0.000, 0.064 and 0.000. We also point out the limitations of the inspiral-only waveform template in eccentricity measurement. The current eccentricity measurement results of GWTC-1 is not enough to constrain the formation mechanisms of BBHs, and more observational data are needed in the future.