Tuning Advanced LIGO to kilohertz signals from neutron-star collisions
Name
PhysRevD.103.022002.pdf
Description
Published version
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466.99 KB
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Author(s)
Ganapathy, Dhruva
McCuller, Lee
Rollins, Jameson Graef
Hall, Evan D
Barsotti, Lisa
Evans, Matthew
Date Issued
2021
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Ganapathy, Dhruva, McCuller, Lee, Rollins, Jameson Graef, Hall, Evan D, Barsotti, Lisa et al. 2021. "Tuning Advanced LIGO to kilohertz signals from neutron-star collisions." Physical Review D, 103 (2).
Version
Final published version
Abstract
© 2021 American Physical Society. Gravitational waves produced at kilohertz frequencies in the aftermath of a neutron star collision can shed light on the behavior of matter at extreme temperatures and densities that are inaccessible to laboratory experiments. Gravitational-wave interferometers are limited by quantum noise at these frequencies but can be tuned via their optical configuration to maximize the probability of postmerger signal detection. We compare two such tuning strategies to turn Advanced LIGO into a postmerger-focused instrument: first, a wideband tuning that enhances the instrument's signal-to-noise ratio 40-80% broadly above 1 kHz relative to the baseline, with a modest sensitivity penalty at lower frequencies; second, a "detuned"configuration that provides even more enhancement than the wideband tuning, but over only a narrow frequency band and at the expense of substantially worse quantum noise performance elsewhere. With an optimistic accounting for instrument loss and uncertainty in postmerger parameters, the detuned instrument has a 40% sensitivity improvement compared to the wideband instrument.
MIT Department
LIGO (Observatory : Massachusetts Institute of Technology)
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DOI of Published Version
https://doi.org/10.1103/PHYSREVD.103.022002
