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Magnetic effects on fundamental modes in rotating neutron stars with a purely toroidal magnetic field
Anson Ka Long Yip, Tjonnie Guang Feng Li
Electromagnetic and gravitational-wave signals from neutron stars are shaped by rapid rotation and strong magnetic fields. Determining these properties is essential to interpret su…
Constraining initial orbital eccentricity of inspiral-dominated gravitational-wave events with an analytic approximant
Hemantakumar Phurailatpam, Gopakumar Achamveedu, Maria Haney +2
The LIGO-Virgo-KAGRA consortium has sporadically detected inspiral-dominated gravitational-wave events such as GW170817 and GW190425. These events offer an opportunity to constrain…
Complete Hamiltonian Framework of Relativistic Hierarchical Triple Systems: Capabilities and Limitations of Secular Perturbation Theory
Kaye Jiale Li, Kinwah Wu, Ziri Younsi +1
Relativistic secular perturbation theory has ignited significant interest in uncovering intricate cross-term effects, especially the interplay between 1PN and quadrupole terms. Whi…
Fundamental modes of rotating neutron stars with various degrees of differential rotation in dynamical spacetimes
Anson Ka Long Yip, Patrick Chi-Kit Cheong, Tjonnie Guang Feng Li
Violent astrophysical events, including core-collapse supernovae and binary neutron star mergers, can result in rotating neutron stars with diverse degrees of differential rotation…
General-relativistic radiation transport scheme in Gmunu II: Implementation of novel microphysical library for neutrino radiation -- Weakhub
Harry Ho-Yin Ng, Patrick Chi-Kit Cheong, Alan Tsz-Lok Lam +1
We introduce \texttt{Weakhub}, a novel neutrino microphysics library that provides opacities and kernels beyond conventional interactions used in the literature. This library inclu…
Gravitational wave signatures from the phase-transition-induced collapse of a magnetized neutron star
Anson Ka Long Yip, Patrick Chi-Kit Cheong, Tjonnie Guang Feng Li
Strong magnetic fields make neutron stars potential sources of detectable electromagnetic and gravitational-wave signals. Hence, inferring these magnetic fields is critical to unde…
Oscillations of Highly Magnetized Non-rotating Neutron Stars
Man Yin Leung, Anson Ka Long Yip, Patrick Chi-Kit Cheong +1
Highly magnetized neutron stars are promising candidates to explain some of the most peculiar astronomical phenomena, for instance, fast radio bursts, gamma-ray bursts, and superlu…
Formation of a magnetized hybrid star with a purely toroidal field from phase-transition-induced collapse
Anson Ka Long Yip, Patrick Chi-Kit Cheong, Tjonnie Guang Feng Li
Strongly magnetized neutron stars are popular candidates for producing detectable electromagnetic and gravitational-wave signals. Gravitational collapses of neutron stars triggered…
Improving Detection of Gravitational wave Microlensing Using Repeated Signals Induced by Strong Lensing
Eungwang Seo, Otto A. Hannuksela, Tjonnie G. F. Li
Microlensing imprints by typical stellar mass lenses on gravitational waves are challenging to identify in the LIGO and Virgo frequency band because such effects are weak. However,…
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…
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…
Probing the existence of ultralight bosons with a single gravitational-wave measurement
Otto A. Hannuksela, Kaze W. K. Wong, Richard Brito +2
Light bosons, proposed as a possible solution to various problems in fundamental physics and cosmology, include a broad class of candidates for beyond the Standard Model physics, s…
Search for long-lived gravitational-wave transients coincident with long gamma-ray bursts
The LIGO Scientific Collaboration, the Virgo Collaboration, J. Aasi +875
Long gamma-ray bursts (GRBs) have been linked to extreme core-collapse supernovae from massive stars. Gravitational waves (GW) offer a probe of the physics behind long GRBs. We inv…