174 citations · 1.4k across the 38 of their papers we have counts for
13 papers · 1 filter
Revisiting the apparent horizon finding problem with multigrid methods
Hon-Ka Hui, Lap-Ming Lin
Apparent horizon plays an important role in numerical relativity as it provides a tool to characterize the existence and properties of black holes on three-dimensional spatial slic…
Fully general relativistic simulations of rapidly rotating quark stars: Oscillation modes and universal relations
Kenneth Chen, Lap-Ming Lin
(Abridged) Numerical simulation of strange quark stars (QSs) is challenging due to the strong density discontinuity at the stellar surface. In this paper, we report successful simu…
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…
Unveiling the universality of I-Love-Q relations
Y. -H. Sham, T. K. Chan, L. -M. Lin +1
The recent discovery of the universal I-Love-Q relations connecting the moment of inertia, tidal deformability, and the spin-induced quadrupole moment of compact stars is intriguin…
Testing universal relations of neutron stars with a nonlinear matter-gravity coupling theory
Y. -H. Sham, L. -M. Lin, P. T. Leung
Due to our ignorance of the equation of state (EOS) beyond nuclear density, there is still no unique theoretical model for neutron stars (NSs). It is therefore surprising that univ…
Radial oscillations and stability of compact stars in Eddington-inspired Born-Infeld gravity
Y. -H. Sham, L. -M. Lin, P. T. Leung
We study the hydrostatic equilibrium structure of compact stars in the Eddington-inspired Born-Infeld gravity recently proposed by Banados and Ferreira [Phys. Rev. Lett. 105, 01110…
Inferring physical parameters of compact stars from their f-mode gravitational wave signals
H. K. Lau, P. T. Leung, L. M. Lin
We propose here a robust scheme to infer the physical parameters of compact stars from their f-mode gravitational wave signals. We first show that the frequency and the damping rat…
Oscillations of General Relativistic Multi-fluid/Multi-layer Compact Stars
Lap-Ming Lin, N. Andersson, G. L. Comer
We develop the formalism for determining the quasinormal modes of general relativistic multi-fluid compact stars in such a way that the impact of superfluid gap data can be assesse…
A new spectral apparent horizon finder for 3D numerical relativity
Lap-Ming Lin, Jerome Novak
We present a new spectral-method-based algorithm for finding apparent horizons in three-dimensional space-like hypersurfaces without symmetries. While there are already a wide vari…
Rotating star initial data for a constrained scheme in numerical relativity
Lap-Ming Lin, Jerome Novak
A new numerical code for computing stationary axisymmetric rapidly rotating stars in general relativity is presented. The formulation is based on a fully constrained-evolution sche…
Nonlinear r-modes in neutron stars: A hydrodynamical limitation on r-mode amplitudes
Lap-Ming Lin, Wai-Mo Suen
Previously we found that large amplitude -modes could decay catastrophically due to nonlinear hydrodynamic effects. In this paper we found the particular coupling mechanism resp…
Nonlinear r-Modes in Neutron Stars: Instability of an unstable mode
Philip Gressman, Lap-Ming Lin, Wai-Mo Suen +2
We study the dynamical evolution of a large amplitude r-mode by numerical simulations. R-modes in neutron stars are unstable growing modes, driven by gravitational radiation reacti…
Quasi-Normal Modes of General Relativistic Superfluid Neutron Stars
G. L. Comer, David Langlois, Lap Ming Lin
We develop a general formalism to treat, in general relativity, the linear oscillations of a two-fluid star about static (non-rotating) configurations. Such a formalism is intended…