Search method for an emission line of a GW background

11th Edoardo Amaldi Conference on Gravitational Waves

Nishizawa, Atsushi^1 ; Seto, Naoki^2

Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena

A 91125, United States^1

Department of Physics, Kyoto University, Kyoto, 606-8502, Japan^2

关键词: Bin widths;    Early universe;    Emission lines;    GW detectors;    Search method;    Sharp emission;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/716/1/012013/pdf
DOI  :  10.1088/1742-6596/716/1/012013

来源: IOP

【 摘 要 】

A sharp emission line of a gravitational-wave background (GWB) would be an interesting observational target. Here we study an efficient method to detect a line GWB by correlating data of multiple GW detectors. We find that the width of frequency bin in the data analysis is a critical parameter, and, with the commonly-used value 0.25 Hz, the signal-to-noise ratio could be decreased by up to a factor of 6.6, compared with a finer width of 0.02Hz. By reanalyzing the existing data with a smaller bin width, we might detect a precious line signal from the early universe.