04/14
2022
Seminar
- Title题目 Prospects and Strategies for Detecting Gravitational Wave Memory from SDSSJ1430+2303 by Pulsar Timing Arrays
- Speaker报告人 陈洁文 (华中科技大学引力中心)
- Date日期 2022年4月14日 14:30
- Venue地点 线上，腾讯会议地址 https://meeting.tencent.com/dm/w7QWuMF1eYF3
Abstract摘要
Recent observations of Seyfert 1 galaxy SDSSJ1430+2303 indicate that there exists a supermassive binary black hole (SMBBH) system, which will merge soon. For the merging SMBBH scenario, SDSSJ1430+2303 can be a source of nonlinear gravitational wave memory, which may provide a promising target for future pulsar timing array (PTA) observations. We investigate the prospects for detecting the memory signal by the International PTA (IPTA) and FAST-PTA in the next 5 years. Firstly, the strategies on searching for this target signal are proposed, including the selection of millisecond pulsars (MSPs) and the distribution of observation time. Furthermore, we obtain the probability density functions of the network signal-to-noise ratio and parameter-estimation errors by simulations. Our result shows that although IPTA can marginally detect the BWM in 5 years, FAST-PTA can detect it with significantly higher confidence. Moreover, the achieved IPTA data is important in estimating the merger time of the SMBBH, when combined with the FAST-PTA data. This work can serve as a guidance for future PTA observations and multi-messenger studies on SDSSJ1430+2303 and similar systems.
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