Search method for an emission line of a GW background. (May 2016)

• Record Type: Journal Article
• Authors: Nishizawa, Atsushi; Seto, Naoki
• Is Part Of: Journal of physics. Volume 716(2016)
• Publication Date: 2016-05
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/716/1/012013
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 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.