5 papers
Axisymmetric stability of neutron stars as extreme rotators in massive scalar-tensor theory
Alan Tsz-Lok Lam, Kalin V. Staykov, Hao-Jui Kuan +2
Differentially rotating scalarized neutron stars, mimickers of binary merger remnants, can possess an enormous angular momentum larger than what could possibly be sustained in a ne…
SACRA-2D: New axisymmetric general relativistic hydrodynamics code with fixed mesh refinement
Alan Tsz-Lok Lam, Masaru Shibata
We present \texttt{SACRA-2D}, a new MPI and OpenMP parallelized, fully relativistic hydrodynamics (GRHD) code in dynamical spacetime under axial symmetry with the cartoon method us…
Self-consistent scenario for jet and stellar explosion in collapsar: General relativistic magnetohydrodynamics simulation with dynamo
Masaru Shibata, Sho Fujibayashi, Shinya Wanajo +3
A resistive magnetohydrodynamics simulation with a dynamo term is performed for modeling the collapsar in full general relativity. As an initial condition, a spinning black hole an…
Accessing universal relations of binary neutron star waveforms in massive scalar-tensor theory
Alan Tsz-Lok Lam, Yong Gao, Hao-Jui Kuan +3
We investigate how the quasi-universal relations connecting tidal deformability with gravitational waveform characteristics and/or properties of individual neutron stars that were…
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…