论文标题
镜头或不镜头：从单个检测中确定二进制中子星合并的透明镜头。
Lensed or not lensed: Determining lensing magnifications for binary neutron star mergers from a single detection
论文作者
论文摘要
晚期的高级Ligo和Advanced处女座可以观察到未来几年的第一个镜头引力源，而未来的爱因斯坦望远镜可以观察到数百个镜头事件。因此，开发方法以区分镜头与未放置重力波观测的方法至关重要。未识别的镜头信号将导致源解释过程中的偏见。特别是，来源似乎将具有内在的质量更高。目前尚无可靠的方法来区分镜头和本质上高质量源引起的放大偏置。在这项工作中，我们通过测量其潮汐效应来识别镜头和放大的二元中子星系，以作为原则证明的潮汐效应。所提出的方法可用于鉴定透明的二元中子星，这是镜头宇宙学研究的主要候选者。我们将我们的方法应用于GW190425，没有发现任何有利于镜头的证据，这主要是由于对事件的潮汐效应的测量不佳。但是，我们预计以更好的潮汐测量检测可以产生更好的限制。
Advanced LIGO and Advanced Virgo could observe the first lensed gravitational wave sources in the coming years, while the future Einstein Telescope could observe hundreds of lensed events. It is, therefore, crucial to develop methodologies to distinguish between lensed from unlensed gravitational-wave observations. A lensed signal not identified as such will lead to biases during the interpretation of the source. In particular, sources will appear to have intrinsically higher masses. No robust method currently exists to distinguish between the magnification bias caused by lensing and intrinsically high-mass sources. In this work, we show how to recognize lensed and unlensed binary neutron star systems through the measurement of their tidal effects for highly magnified sources as a proof-of-principle. The proposed method could be used to identify lensed binary neutron stars, which are the chief candidate for lensing cosmography studies. We apply our method on GW190425, finding no evidence in favor of lensing, mainly due to the poor measurement of the event's tidal effects. However, we expect that future detections with better tidal measurements can yield better constraints.
