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Kwak, Kyujin
Computational Astrophysics Lab
Research Interests
  • Computational Fluid Dynamics
  • Astrophysical and Laboratory Plasma
  • Hydrodynamics with Radiation
  • Nuclear, Atomic, and Molecular Reactions

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Tidal deformability of neutron stars with realistic nuclear energy density functionals

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Title
Tidal deformability of neutron stars with realistic nuclear energy density functionals
Author
Kim, Young-MinLim, YeunhwanKwak, KyujinHyun, Chang HoLee, Chang-Hwan
Issue Date
2018-12
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW C, v.98, no.6, pp.065805
Abstract
We investigate the constraints on the mass and radius of neutron stars by considering the tidal deformability in the merge of neutron star binaries. We employ models based on the Skyrme force and density-functional theory and select models that are consistent with empirical data of finite nuclei, measured properties of nuclear matter around the saturation density, and observation of the maximum mass of neutron stars. From the selected models, we calculate the Love number k(2), dimensionless tidal deformability Lambda, and mass-weighted deformability (Lambda) over tilde in the binary system. We find that all the models considered in this work give (Lambda) over tilde less than 800, which is the constraint obtained from the measurement of GW170817. The results from our models show a relationship between A and radius (Lambda similar to R-7.5) for a neutron star with a fixed mass of 1.4M(circle dot), which is consistent with the recent statistical analyses.
URI
https://scholarworks.unist.ac.kr/handle/201301/25619
URL
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.98.065805
DOI
10.1103/PhysRevC.98.065805
ISSN
2469-9985
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