Prospects for Detecting Gravitational Waves at 5 Hz with Ground-Based Detectors
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PhysRevLett.120.141102.pdf
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Author(s)
Barr, Bryan
Hammond, Giles
Hild, Stefan
Hough, James
Huttner, Sabina
Rowan, Sheila
Sorazu, Borja
Carbone, Ludovico
Freise, Andreas
Mow-Lowry, Conor
Date Issued
April 2018
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Yu, Hang et al. "Prospects for Detecting Gravitational Waves at 5 Hz with Ground-Based Detectors." Physical Review Letters 120, 14 (April 2018): 141102 © 2018 American Physical Society
Version
Final published version
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_{⊙}. 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
LIGO (Observatory : Massachusetts Institute of Technology)
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.120.141102
