195 citations · 1.1k across the 22 of their papers we have counts for
22 papers
Influence of effective mass of the relativistic mean field theory on core collapse supernovae and compact objects
Kohsuke Sumiyoshi, Hajime Togashi, Shun Furusawa +4
We study the influence of the effective mass in the relativistic mean field (RMF) theory on the properties of the central core of collapse-driven supernovae and the formation of co…
The -mode frequencies in cold neutron stars and nuclear saturation parameters
Hajime Sotani, Hajime Togashi
Oscillation frequencies excited in neutron stars are crucial for extracting their interior properties. In addition to the fundamental and pressure modes, the gravity (-) modes c…
Role of symmetry energy at subnuclear densities in protoneutron star crusts
Ken'ichiro Nakazato, Hajime Togashi, Kohsuke Sumiyoshi +1
The impact of matter properties at subnuclear densities on the evolution of protoneutron stars is investigated. Several models of nuclear equation of state (EOS) are constructed wi…
Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
Rajesh Kumar, Veronica Dexheimer, Johannes Jahan +57
This review aims at providing an extensive discussion of modern constraints relevant for dense and hot strongly interacting matter. It includes theoretical first-principle results…
Neutron star mass formula with nuclear saturation parameters for asymmetric nuclear matter
Hajime Sotani, Shinsuke Ota
Low-mass neutron stars are directly associated with the nuclear saturation parameters because their central density is definitely low. We have already found a suitable combination…
Effects of finite sizes of atomic nuclei on shear modulus and torsional oscillations in neutron stars
Hajime Sotani, Hajime Togashi, Masatoshi Takano
The shear modulus of neutron star matter is one of the important properties for determining torsional oscillations in neutron stars. We take into account the effects of finite size…
Effects of nuclear matter and composition in core-collapse supernovae and long-term proto-neutron star cooling
Kohsuke Sumiyoshi, Shun Furusawa, Hiroki Nagakura +4
We study the influence of hot and dense matter in core-collapse supernovae by adopting up-to-date nuclear equation of state (EOS) based on the microscopic nuclear many-body framewo…
Neutron star mass formula with nuclear saturation parameters
Hajime Sotani, Hajime Togashi
We derive the empirical formulas for the neutron star mass and gravitational redshift as a function of the central density and specific combination of the nuclear saturation parame…
Merger and post-merger of binary neutron stars with a quark-hadron crossover equation of state
Yong-Jia Huang, Luca Baiotti, Toru Kojo +6
Fully general-relativistic binary-neutron-star (BNS) merger simulations with quark-hadron crossover (QHC) equations of state (EOSs) are studied for the first time. In contrast to E…
Universal relation for supernova gravitational waves
Hajime Sotani, Tomoya Takiwaki, Hajime Togashi
Using the numerical simulation data for two-dimensional core-collapse supernova, we examine the protoneutron star (PNS) asteroseismology with the relativistic Cowling approximation…
Numerical Study of Stellar Core Collapse and Neutrino Emission Using the Nuclear Equation of State Obtained by the Variational Method
Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hajime Togashi
Core-collapse simulations of massive stars are performed using the equation of state (EOS) based on the microscopic variational calculation with realistic nuclear forces. The proge…
Phenomenological QCD equations of state for neutron star dynamics: Nuclear-2SC continuity and evolving effective couplings
Toru Kojo, Defu Hou, Jude Okafor +1
We delineate the quark-hadron continuity by constructing QCD equations of state for neutron star dynamics, covering the wide range of charge chemical potential () and temperat…
Systematic study on the quark-hadron mixed phase in compact stars
Cheng-Jun Xia, Toshiki Maruyama, Nobutoshi Yasutake +3
We investigate systematically the quark-hadron mixed phase in dense stellar matter, and its influence on compact star structures. The properties of quark matter and hadronic matter…
New Neutron Star Equation of State with Quark-Hadron Crossover
Gordon Baym, Shun Furusawa, Tetsuo Hatsuda +2
We present a much improved equation of state for neutron star matter, QHC19, with a smooth crossover from the hadronic regime at lower densities to the quark regime at higher densi…
Comparing treatments of weak reactions with nuclei in simulations of core-collapse supernovae
Hiroki Nagakura, Shun Furusawa, Hajime Togashi +3
We perform an extensive study of the influence of nuclear weak interactions on core-collapse supernovae (CCSNe), paying particular attention to consistency between nuclear abundanc…
Heavy Nuclei as Thermal Insulation for Proto-Neutron Stars
Ken'ichiro Nakazato, Hideyuki Suzuki, Hajime Togashi
A proto-neutron star (PNS) is a newly formed compact object in a core collapse supernova. In this Letter, the neutrino emission from the cooling process of a PNS is investigated us…
Neutron-star radii based on realistic nuclear interactions
Y. Yamamoto, H. Togashi, T. Tamagawa +3
The existence of neutron stars with requires the strong stiffness of the equation of state (EoS) of neutron-star matter. We introduce a multi-pomeron exchange potential…
A new equation of state for core-collapse supernovae based on realistic nuclear forces and including a full nuclear ensemble
S. Furusawa, H. Togashi, H. Nagakura +4
We have constructed a nuclear equation of state (EOS) that includes a full nuclear ensemble for use in core-collapse supernova simulations. It is based on the EOS for uniform nucle…
Nuclear equation of state for core-collapse supernova simulations with realistic nuclear forces
H. Togashi, K. Nakazato, Y. Takehara +3
A new table of the nuclear equation of state (EOS) based on realistic nuclear potentials is constructed for core-collapse supernova numerical simulations. Adopting the EOS of unifo…
Equation of state for neutron stars with hyperons by the variational method
H. Togashi, E. Hiyama, Y. Yamamoto +1
We investigate the effects of the odd-state part of bare interactions on the structure of neutron stars (NSs) by constructing equations of state (EOSs) for uniform nuclear mat…
Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae
H. Togashi, M. Takano, K. Sumiyoshi +1
The equation of state (EOS) for hot asymmetric nuclear matter which is constructed with the variational method starting from the Argonne v18 and Urbana IX nuclear forces is applied…
Variational study for the equation of state of asymmetric nuclear matter at finite temperatures
H. Togashi, M. Takano
An equation of state (EOS) for uniform asymmetric nuclear matter (ANM) is constructed at zero and finite temperatures by the variational method starting from the nuclear Hamiltonia…