36 citations · 71 across the 13 of their papers we have counts for
14 papers
Anisotropic Fluid Model for Massive Boson Stars: Spherically Symmetric Configurations
Ethan McKeever, Victor Guedes, Shu Yan Lau +1
Boson stars are among the best-studied exotic compact objects and constitute one of the few black-hole mimickers for which both the formation mechanism and dynamical behavior can b…
New Universal Relations for Magnetized Neutron Stars
Byon N. Jayawiguna, Siddarth Ajith, Takuya Katagiri +2
Unlike the neutron-star mass--radius relation, which depends sensitively on the internal stellar structure through the equation of state of dense nuclear matter, certain neutron-st…
Out-of-Equilibrium Effects in Non-Radial Relativistic Stellar Perturbations: A Model-Agnostic Formulation and Mode Analysis
Takuya Katagiri, Victor Guedes, Kent Yagi
We present a systematic, model-agnostic analysis of out-of-equilibrium effects, including viscosity and thermal conductivity, in non-radial oscillations of relativistic stars. Exte…
Higher-Derivative Corrections to Reissner--Nordström Black Holes from Worldline QFT
Siddarth Ajith, Ravisankar Rajagopal, Nur Rifat +2
In this paper we derived the corrections to the Reissner-Nordström black hole when higher-derivative terms (contractions of the Riemann tensor with the Maxwell field strengt…
Spacetime Quasi-normal Mode Oscillations of Anisotropic Neutron Stars
Jihao Yu, Victor Guedes, Shu Yan Lau +2
Neutron star asteroseismology offers a unique opportunity to probe nuclear physics through stellar oscillations. Although the pressure inside of a neutron star is typically assumed…
Gravitational-Wave Constraints on Neutron-Star Pressure Anisotropy via Universal Relations
Victor Guedes, Siddarth Ajith, Shu Yan Lau +1
Neutron stars may exhibit pressure anisotropy arising from various physical mechanisms, such as elasticity, magnetic fields, viscosity, and superfluidity. We compute the tidal defo…
Universal Relations for Elastic Hybrid Stars and Quark Stars
Chun-Ming Yip, Shu Yan Lau, Kent Yagi
Some compact stars may contain deconfined quark matter, forming hybrid stars or quark stars. If the quark matter forms an inhomogeneous condensate in the crystalline color supercon…
New modeling for hybrid stars with an elastic quark core
Zoey Zhiyuan Dong, Shu Yan Lau, Kent Yagi
Heavy neutron stars may contain solid quark cores as motivated by, e.g. the crystalline color superconducting phase, forming elastic hybrid stars (HSs). Many previous studies assum…
Probing dark-matter effects with gravitational waves using the parameterized post-Einsteinian framework
Eileen Wilcox, David Nichols, Kent Yagi
A massive black hole can develop a dark-matter overdensity, and the dark matter changes the evolution of a stellar-mass compact object inspiraling around the massive black hole thr…
Tight bound on neutron-star radius with quasiperiodic oscillations in short gamma-ray bursts
Victor Guedes, David Radice, Cecilia Chirenti +1
Quasiperiodic oscillations (QPOs) have been recently discovered in the short gamma-ray bursts (GRBs) 910711 and 931101B. Their frequencies are consistent with those of the quasirad…
Love-C relations for elastic hybrid stars
Zoey Zhiyuan Dong, Joshua Cole Faggert, Shu Yan Lau +1
Neutron stars (NSs) provide a unique laboratory to study matter under extreme densities. Recent observations from gravitational and electromagnetic waves have enabled constraints o…
Nonradial instabilities in anisotropic neutron stars
Shu Yan Lau, Siddarth Ajith, Victor Guedes +1
Non-radial oscillation modes of a neutron star possess valuable information about its internal structure and nuclear physics. Starting from the quadrupolar order, such modes under…
Quasinormal modes and their excitation beyond general relativity
Hector O. Silva, Giovanni Tambalo, Kostas Glampedakis +2
The response of black holes to small perturbations is known to be partially described by a superposition of quasinormal modes. Despite their importance to enable strong-field tests…
The broadening of universal relations at the birth and death of a neutron star
Victor Guedes, Shu Yan Lau, Cecilia Chirenti +1
Certain relations among neutron-star observables that are insensitive to the equation of state are known to exist. Such universal relations have been shown to be valid for cold and…