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Published June 15, 2015 | Published + Submitted
Journal Article Open

Search for an emission line of a gravitational wave background

Abstract

In light of the history of research on an electromagnetic wave spectrum, a sharp emission line of 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 ground-based detectors. We find that the width of frequency bin for coarse graining 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 0.02 Hz. By reanalyzing the existing data with a smaller bin width, we might detect a precious line signal from the early Universe.

Additional Information

© 2015 American Physical Society. Received 8 March 2015; published 1 June 2015. A. N. is supported by JSPS Postdoctoral Fellowships for Research Abroad. N. S. is supported by JSPS (24540269) and MEXT (24103006).

Attached Files

Published - PhysRevD.91.122001.pdf

Submitted - 1503.00354v1.pdf

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August 20, 2023
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