The Study of Gravitational Wave Source Localization for Eccentric Compact Binaries Coalesce with the Ground-Based Detector Network

Hsing-Po Pan^1*, Zhoujian Cao^2,3, Chun-Yu Lin⁴, Hwei-Jang Yo¹

¹Department of Physics, National Cheng-Kung University, Tainan, Taiwan
²Department of Astronomy, Beijing Normal University, Beijing, China
³Institute of Applied Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China
⁴National Center for High-Performance Computing, Hsinchu, Taiwan

* Presenter:Hsing-Po Pan, email:hppan@phys.ncku.edu.tw

Gravitational wave source localization problem is important in gravitational wave astronomy. Regarding ground-based detector, most of the previous investigations only considered the difference of arrival time among the detector network for source localization. Within the matched filtering framework, the information beside the arrival time difference can possibly also be of some help on source localization. Especially when an eccentric binary is considered, the character involved in the gravitational waveform may improve the source localization. We investigate this effect systematically in the current paper. The enhanced post-circular (EPC) waveform model is used to describe the eccentric compact binary coalesce. We consider the ground-based detector network with three, four and five detectors. We find that the source localization accuracy increases along with the eccentricity increases and number of detector increases.

Keywords: gravitational wave, source localization