Dec 11 – 15, 2023
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Detecting Strong Gravitational Lensing of Gravitational Waves with TianQin

Dec 12, 2023, 3:00 PM
15m
Hall # 8

Hall # 8

Plenary Talk Gravitational Lensing

Speaker

Xinyi Lin

Description

We discuss the capability of TianQin to detect lensed MBHB signals. Three lens models are considered in this work: the point mass model, the SIS model, and the NFW model. The sensitive frequency band for space-borne \ac{GW} detectors is around milli-hertz, and the corresponding GW wavelength could be comparable to the lens gravitational length scale, which requires us to account for wave diffraction effects. In calculating lensed waveforms, we adopt the approximation of geometric optics at high frequencies to accelerate computation, while precisely evaluate the diffraction integral at low frequencies. Through a Fisher analysis, we analyse the accuracy to estimate the lens parameters. We also assess the impact on the accuracy of estimating the source parameters.

Primary authors

Xinyi Lin Dr Jian-dong Zhang (TianQin Research Center for Gravitational wave Physics, Sun Yat-sen University (Zhuhai Campus)) Dr Liang Dai (Department of Physics, University of California, 366 Physics North MC 7300, Berkeley, California 94720, USA)

Co-authors

Dr Shun-Jia Huang (TianQin Research Center for Gravitational wave Physics, Sun Yat-sen University (Zhuhai Campus)) Prof. Jianwei Mei (TianQin Research Center for Gravitational wave Physics, Sun Yat-sen University (Zhuhai Campus))

Presentation materials