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Ranking Candidate Signals with Machine Learning in Low-Latency Search for Gravitational-Waves from Compact Binary Mergers
Kyungmin Kim, Tjonnie G. F. Li, Rico K. L. Lo +2
In the multi-messenger astronomy era, accurate sky localization and low latency time of gravitational-wave (GW) searches are keys in triggering successful follow-up observations on…
Probing the Purely Ingoing Nature of the Black-hole Event Horizon
Ka-Wai Chung, Tjonnie Guang Feng Li
One of the most fundamental results of general relativity is that the event horizon of black hole is purely ingoing. On the other hand, semiclassical-gravity effects, such as parti…
Searching for primordial black holes with stochastic gravitational-wave background in the space-based detector frequency band
Yi-Fan Wang, Qing-Guo Huang, Tjonnie G. F. Li +1
Assuming that primordial black holes compose a fraction of dark matter, some of them may accumulate at the center of galaxy and perform a prograde or retrograde orbit against the g…
Searching for ultralight bosons within spin measurements of a population of binary black hole mergers
Ken K. Y. Ng, Otto A. Hannuksela, Salvatore Vitale +1
Ultralight bosons can form clouds around rotating black holes if their Compton wavelength is comparable to the black hole size. The boson cloud spins down the black hole through a…
Extreme Dark Matter Tests with Extreme Mass Ratio Inspirals
Otto A. Hannuksela, Kenny C. Y. Ng, Tjonnie G. F. Li
Future space-based laser interferometry experiments such as LISA are expected to detect (100--1000) stellar-mass compact objects (e.g., black holes, neutron stars) falling…
Targeted Sub-threshold Search for Strongly-lensed Gravitational-wave Events
Alvin K. Y. Li, Rico K. L. Lo, Surabhi Sachdev +4
Strong gravitational lensing of gravitational waves can produce duplicate signals separated in time with different amplitudes. We consider the case in which strong lensing produces…
Observational signatures of microlensing in gravitational waves at LIGO/Virgo frequencies
J. M. Diego, O. A. Hannuksela, P. L. Kelly +4
Microlenses with typical stellar masses (a few ) have traditionally been disregarded as potential sources of gravitational lensing effects at LIGO/Virgo frequencie…
The GstLAL Search Analysis Methods for Compact Binary Mergers in Advanced LIGO's Second and Advanced Virgo's First Observing Runs
Surabhi Sachdev, Sarah Caudill, Heather Fong +26
After their successful first observing run (September 12, 2015 - January 12, 2016), the Advanced LIGO detectors were upgraded to increase their sensitivity for the second observing…
Fast evaluation of multi-detector consistency for real-time gravitational wave searches
Chad Hanna, Sarah Caudill, Cody Messick +17
Gravitational waves searches for compact binary mergers with LIGO and Virgo are presently a two stage process. First, a gravitational wave signal is identified. Then, an exhaustive…