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

Identification of Gravitational-waves from Extreme Mass Ratio Inspirals

Dec 15, 2023, 2:45 PM
1h
Poster Poster

Speaker

Mr Chang-Qing Ye (TianQin Research Center for Gravitational Physics Sun Yat-sen University (Zhuhai Campus))

Description

Space-based gravitational wave detectors like TianQin or LISA could observe extreme-mass-ratio-inspirals (EMRIs) at millihertz frequencies. The accurate identification of these EMRI signals from the data plays a crucial role in enabling in-depth study of astronomy and physics. We aim at the identification stage of the data analysis, with the aim to extract key features of the signal from the data, such as the evolution of the orbital frequency, as well as to pinpoint the parameter range that can fit the data well for the subsequent parameter inference stage. In this manuscript, we demonstrated the identification of EMRI signals without any additional prior information on physical parameters. High-precision measurements of EMRI signals have been achieved, using a hierarchical search. It combines the search for physical parameters that guide the subsequent parameter inference, and a semi-coherent search with phenomenological waveforms that reaches precision levels down to $10^{-4}$ for the phenomenological waveform parameters $\omega_{0}$, $\dot{\omega}_{0}$, and $\ddot{\omega}_{0}$. As a result, we obtain measurement relative errors of less than 4% for the mass of the massive black hole, while keeping the relative errors of the other parameters within as small as 0.5%.arXiv:2310.03520

Primary author

Mr Chang-Qing Ye (TianQin Research Center for Gravitational Physics Sun Yat-sen University (Zhuhai Campus))

Co-authors

Mr Alejandro Torres-Orjuela (TianQin Research Center for Gravitational Physics Sun Yat-sen University (Zhuhai Campus)) Ms Hui-Min Fan (TianQin Research Center for Gravitational Physics Sun Yat-sen University (Zhuhai Campus)) Mr Jian-Dong zhang (TianQin Research Center for Gravitational Physics Sun Yat-sen University (Zhuhai Campus)) Mr Yi-Ming Hu (TianQin Research Center for Gravitational Physics Sun Yat-sen University (Zhuhai Campus))

Presentation materials

There are no materials yet.