Lap-Ming Lin
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View article: I-Love-Q relations of fermion-boson stars
I-Love-Q relations of fermion-boson stars Open
We investigate the properties of fermion-boson stars (FBSs), which can be viewed as neutron stars with a bosonic dark matter (DM) admixture. A challenge in studying the impact of DM on neutron stars is the absence of a universally accepted…
View article: Revisiting the apparent horizon finding problem with multigrid methods
Revisiting the apparent horizon finding problem with multigrid methods Open
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 slices in 3+1 numerical spacetimes. Apparent horizon finders ba…
View article: Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion
Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion Open
Torsional oscillations of magnetized neutron stars have been well studied since they may be relevant to the physical interpretation of some of the observed quasiperiodic oscillations in the magnetar giant flares. In the crustal region of a…
View article: Revisiting the apparent horizon finding problem with multigrid methods
Revisiting the apparent horizon finding problem with multigrid methods Open
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 slices in 3+1 numerical spacetimes. Apparent horizon finders ba…
View article: On the Nucleosynthesis in Accretion-Induced Collapse of White Dwarfs
On the Nucleosynthesis in Accretion-Induced Collapse of White Dwarfs Open
It has long been hypothesized that accretion-induced collapse (AIC) of white dwarfs contribute to heavy chemical elements production in the universe. We present one-dimensional neutrino-radiative hydrodynamic simulations of AIC followed by…
View article: Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion
Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion Open
Torsional oscillations of magnetized neutron stars have been well studied since they may be relevant to the physical interpretation of some of the observed quasiperiodic oscillations in the magnetar giant flares. In the crustal region of a…
View article: R-process Nucleosynthesis of Subminimal Neutron Star Explosions
R-process Nucleosynthesis of Subminimal Neutron Star Explosions Open
We show that a minimum-mass neutron star undergoes delayed explosion after mass removal from its surface. We couple the Newtonian hydrodynamics to a nuclear reaction network of ∼4500 isotopes to study the nucleosynthesis and neutrino emiss…
View article: Fully general relativistic simulations of rapidly rotating quark stars: Oscillation modes and universal relations
Fully general relativistic simulations of rapidly rotating quark stars: Oscillation modes and universal relations Open
(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 simulations of rapidly rotating QSs and study their oscillation…
View article: Oscillations and tidal deformations of crystallized white dwarfs
Oscillations and tidal deformations of crystallized white dwarfs Open
Long predicted more than fifty years ago, strong evidence for the existence of crystalline cores inside white dwarfs has recently been obtained by the Gaia space telescope. It is thus important to investigate how a crystalline core may aff…
View article: R-process Nucleosynthesis of Subminimal Neutron Star Explosions
R-process Nucleosynthesis of Subminimal Neutron Star Explosions Open
We show that a minimum-mass neutron star undergoes delayed explosion after mass removal from its surface. We couple the Newtonian hydrodynamics to a nuclear reaction network of $\sim4500$ isotopes to study the nucleosynthesis and neutrino …
View article: Tidal deformability of dark matter admixed neutron stars
Tidal deformability of dark matter admixed neutron stars Open
The tidal properties of a neutron star are measurable in the gravitational\nwaves emitted from inspiraling binary neutron stars, and they have been used to\nconstrain the neutron star equation of state. In the same spirit, we study the\ndi…
View article: Neutron star oscillations in pseudo-Newtonian gravity
Neutron star oscillations in pseudo-Newtonian gravity Open
We investigate the oscillations of neutron stars using a purely Newtonian approach and three other pseudo-Newtonian formulations. Our work is motivated by the fact that pseudo-Newtonian formulations are commonly used in core-collapse super…
View article: Could the GW190814 Secondary Component Be a Bosonic Dark Matter Admixed Compact Star?
Could the GW190814 Secondary Component Be a Bosonic Dark Matter Admixed Compact Star? Open
We investigate whether the recently observed 2.6 M ⊙ compact object in the gravitational wave event GW190814 can be a bosonic dark matter (DM) admixed compact star. By considering the three constraints of mass, radius, and the stability of…
View article: Can the GW190814 secondary component be a bosonic dark matter admixed compact star?
Can the GW190814 secondary component be a bosonic dark matter admixed compact star? Open
We investigate whether the recently observed 2.6 $M_\odot$ compact object in the gravitational-wave event GW190814 can be a bosonic dark matter admixed compact star. By considering the three constraints in mass, radius and stability of suc…
View article: Gravitational-wave Asteroseismology with f-modes from Neutron Star Binaries at the Merger Phase
Gravitational-wave Asteroseismology with f-modes from Neutron Star Binaries at the Merger Phase Open
Gravitational-wave signals from coalescing binary neutron stars (BNSs) can yield important information about the properties of nuclear-matter equation of state. We investigate a direct link between the frequency of the quadrupolar 2 f -mod…
View article: Gravitational-wave Signature of a First-order Quantum Chromodynamics Phase Transition in Core-Collapse Supernovae
Gravitational-wave Signature of a First-order Quantum Chromodynamics Phase Transition in Core-Collapse Supernovae Open
A first-order quantum chromodynamics (QCD) phase transition (PT) may take place in the protocompact star (PCS) produced by a core-collapse supernova (CCSN). In this work, we study the consequences of such a PT in a nonrotating CCSN with ax…
View article: Accretion-induced Collapse of Dark Matter Admixed White Dwarfs. I. Formation of Low-mass Neutron Stars
Accretion-induced Collapse of Dark Matter Admixed White Dwarfs. I. Formation of Low-mass Neutron Stars Open
Recently observed pulsars with masses ∼1.1 M ⊙ challenge the conventional neutron star (NS) formation path by core-collapse supernova (CCSN). Using spherically symmetric hydrodynamics simulations, we follow the collapse of a massive white …
View article: Two-layer compact stars with crystalline quark matter: Screening effect on the tidal deformability
Two-layer compact stars with crystalline quark matter: Screening effect on the tidal deformability Open
(Abridged) It is well known that the tidal deformability of a compact star\ncarries important information about the interior equation-of-state (EOS) of the\nstar. The first gravitational-wave event GW170817 from a binary compact star\nmerg…
View article: Universal relations for neutron stars: Selected recent works
Universal relations for neutron stars: Selected recent works Open
It is well known that the properties of a compact star in general depend on the equation-of-state (EOS) of the star. However, various approximately EOS-insensitive universal relations connecting different quantities of compact stars are kn…
View article: Universal Relations for Innermost Stable Circular Orbits around Rapidly Rotating Neutron Stars
Universal Relations for Innermost Stable Circular Orbits around Rapidly Rotating Neutron Stars Open
We study the innermost stable circular orbit (ISCO) of a test particle around rapidly rotating neutron stars. Based on 12 different nuclear-matter equations of state (EOS), we find numerically two approximately EOS-insensitive universal re…
View article: Tidal deformations of compact stars with crystalline quark matter
Tidal deformations of compact stars with crystalline quark matter Open
We study the tidal deformability of bare quark stars and hybrid compact stars\ncomposed of a quark matter core in general relativity, assuming that the\ndeconfined quark matter exists in a crystalline color superconducting phase. We\nfind …