Yu, H. et al. (2018) Prospects for detecting gravitational waves at 5 Hz with ground-based detectors. Physical Review Letters, 120(14), 141102. (doi: 10.1103/PhysRevLett.120.141102)
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Abstract
We propose an upgrade to Advanced LIGO (aLIGO), named LIGO-LF, that focuses on improving the sensitivity in the 5-30 Hz low-frequency band, and we explore the upgrade's astrophysical applications. We present a comprehensive study of the detector's technical noises and show that with technologies currently under development, such as interferometrically sensed seismometers and balanced-homodyne readout, LIGO-LF can reach the fundamental limits set by quantum and thermal noises down to 5 Hz. These technologies are also directly applicable to the future generation of detectors. We go on to consider this upgrade's implications for the astrophysical output of an aLIGO-like detector. A single LIGO-LF can detect mergers of stellar-mass black holes (BHs) out to a redshift of z~6 and would be sensitive to intermediate-mass black holes up to 2000 M_\odot. The detection rate of merging BHs will increase by a factor of 18 compared to aLIGO. Additionally, for a given source the chirp mass and total mass can be constrained 2 times better than aLIGO and the effective spin 3-5 times better than aLIGO. Furthermore, LIGO-LF enables the localization of coalescing binary neutron stars with an uncertainty solid angle 10 times smaller than that of aLIGO at 30 Hz, and 4 times smaller when the entire signal is used. LIGO-LF also significantly enhances the probability of detecting other astrophysical phenomena including the tidal excitation of neutron star r-modes and the gravitational memory effects.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Rowan, Professor Sheila and Hammond, Professor Giles and Hough, Professor James and Hild, Professor Stefan and Barr, Dr Bryan and Sorazu Lucio, Dr Borja and Huttner, Dr Sabina |
| Authors: | Yu, H., Martynov, D., Vitale, S., Evans, M., Shoemaker, D., Barr, B., Hammond, G., Hild, S., Hough, J., Huttner, S., Rowan, S., Sorazu, B., Carbone, L., Freise, A., Mow-Lowry, C., Dooley, K. L., Fulda, P., Grote, H., and Sigg, D. |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
| Research Group: | Institute for Gravitational Research |
| Journal Name: | Physical Review Letters |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| ISSN (Online): | 1079-7114 |
| Copyright Holders: | Copyright © 2018 American Physical Society |
| First Published: | First published in Physical Review Letters 120(14): 141102 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
| Related URLs: |
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