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publications
Does spacetime have memories? Searching for gravitational-wave memory in the third LIGO-Virgo-KAGRA gravitational-wave transient catalogue
Published in Classical and Quantum Gravity, 2024
Gravitational-wave memory is a non-linear effect predicted by general relativity that remains undetected. We apply a Bayesian analysis framework to search for gravitational-wave memory using binary black hole mergers in LIGO-Virgo-KAGRA`ShunYCheung.github.io/_publications/memory_paper.mds third gravitational-wave transient catalogue.
Recommended citation: Shun Yin Cheung et al 2024 Class. Quantum Grav. 41 115010
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A search for extra polarisations using a Gaussian process in Gravitational-Wave Transient Catalogue 3
Published in The Astrophysical Journal (submitted), 2025
General relativity predicts that gravitational waves are described by two polarisation states: the plus state and cross state. However, alternate theories of gravity allow up to six polarisations. We employ the gravitational-wave null stream, a linear combination of three or more detectors where the and signals add to zero, leaving behind noise and potentially gravitational waves in non-standard polarisation states. We develop a Gaussian process model to search for extra polarisations beyond general relativity. Using data from 42 three-detector events from LIGO-Virgo-KAGRAs Third Gravitational-Wave Transient Catalogue, we find no evidence of non-standard polarisations. We set upper limits on the fractional deviation in gravitational-wave strain to be as low as 0.39 at 90% credibility for the event GW190602_175927.
Recommended citation: TBD
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teaching
Teaching experience 1
Undergraduate course, University 1, Department, 2014
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Teaching experience 2
Workshop, University 1, Department, 2015
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