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Gravitational-wave asteroseismology with f-modes from neutron star binaries at the merger phase
Harry Ho-Yin Ng, Patrick Chi-Kit Cheong, Lap-Ming Lin +1
Gravitational-wave signals from coalescing binary neutron stars can yield important information about the properties of nuclear-matter equation of state from the early part of the…
Stellar-mass microlensing of gravitational waves
Mark H. Y. Cheung, Joseph Gais, Otto A. Hannuksela +1
When gravitational waves pass through the nuclear star clusters of galactic lenses, they may be microlensed by the stars. Such microlensing can cause potentially observable beating…
Gmunu: Paralleled, grid-adaptive, general-relativistic magnetohydrodynamics in curvilinear geometries in dynamical spacetimes
Patrick Chi-Kit Cheong, Alan Tsz-Lok Lam, Harry Ho-Yin Ng +1
We present an update of the General-relativistic multigrid numerical (Gmunu) code, a parallelized, multi-dimensional curvilinear, general relativistic magnetohydrodynamics code wit…
The SPIIR online coherent pipeline to search for gravitational waves from compact binary coalescences
Qi Chu, Manoj Kovalam, Linqing Wen +16
This paper presents the SPIIR pipeline used for public alerts during the third advanced LIGO and Virgo observation run (O3 run). The SPIIR pipeline uses infinite impulse response (…
Constraints on ultralight scalar bosons within black hole spin measurements from LIGO-Virgo's GWTC-2
Ken K. Y. Ng, Salvatore Vitale, Otto A. Hannuksela +1
Clouds of ultralight bosons - such as axions - can form around a rapidly spinning black hole, if the black hole radius is comparable to the bosons' wavelength. The cloud rapidly ex…
Identification of Lensed Gravitational Waves with Deep Learning
Kyungmin Kim, Joongoo Lee, Robin S. H. Yuen +2
Similar to light, gravitational waves (GWs) can be lensed. Such lensing phenomena can magnify the waves, create multiple images observable as repeated events, and superpose several…
lensingGW: a Python package for lensing of gravitational waves
Giulia Pagano, Otto A. Hannuksela, Tjonnie G. F. Li
Advanced LIGO and Advanced Virgo could observe the first lensed gravitational waves in the coming years, while the future Einstein Telescope could observe hundreds of lensed events…
Localizing merging black holes with sub-arcsecond precision using gravitational-wave lensing
Otto A. Hannuksela, Thomas E. Collett, Mesut Çalışkan +1
The current gravitational-wave localization methods rely mainly on sources with electromagnetic counterparts. Unfortunately, a binary black hole does not emit light. Due to this, i…
Generic searches for alternative gravitational wave polarizations with networks of interferometric detectors
Peter T. H. Pang, Rico K. L. Lo, Isaac C. F. Wong +2
The detection of gravitational wave signals by Advanced LIGO and Advanced Virgo enables us to probe the polarization content of gravitational waves. In general relativity, only ten…
Ringdown Spectroscopy of Rotating Black Holes Pierced by Cosmic Strings
Mark Ho-Yeuk Cheung, Levi Wing-Hei Poon, Ka-Wai Chung +1
Multiple gauge theories predict the presence of cosmic strings with different mass densities . We derive an equation governing the perturbations of a rotating black hole pi…
Gmunu: Toward multigrid based Einstein field equations solver for general-relativistic hydrodynamics simulations
Patrick Chi-Kit Cheong, Lap-Ming Lin, Tjonnie Guang-Feng Li
We present a new open-source axisymmetric general relativistic hydrodynamics code Gmunu (General-relativistic multigrid numerical solver) which uses a multigrid method to solve the…