155 citations · 1.3k across the 31 of their papers we have counts for
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Possible evolutionary transition from rapidly rotating neutron stars to strange stars due to spin-down
Nobutoshi Yasutake, Masa-aki Hashimoto, Yoshiharu Eriguchi
We present a scenario of formation of strange stars due to spin-down of {\it rapidly rotating} neutron stars left after supernova explosions . By assuming a process where the total…
R-mode oscillations of rapidly rotating barotropic stars in general relativity: Analysis by the relativistic Cowling approximation
Shijun Yoshida, Shin'ichirou Yoshida, Yoshiharu Eriguchi
We develop a numerical scheme for obtaining the -mode oscillations of rapidly rotating relativistic stars. In the present scheme, we neglect all metric perturbations and only ta…
Rapidly rotating superfluid neutron stars in Newtonian dynamics
Shijun Yoshida, Yoshiharu Eriguchi
We develop a formulation for constructing and examining rapidly rotating Newtonian neutron star models that contain two superfluids, taking account of the effect of the rotation ve…
Linear Stability Analysis of Differentially Rotating Polytropes -- New results for the m = 2 f-mode dynamical instability --
Shigeyuki Karino, Yoshiharu Eriguchi
We have studied the -mode oscillations of differentially rotating polytropes by making use of the linear stability analysis. We found that the critical values of where t…
Dynamical bar-mode instability of differentially rotating stars: Effects of equations of state and velocity profiles
Masaru Shibata, Shigeyuki Karino, Yoshiharu Eriguchi
As an extension of our previous work, we investigate the dynamical instability against nonaxisymmetric bar-mode deformations of differentially rotating stars in Newtonian gravity v…
Quasiequilibrium sequences of synchronously rotating binary neutron stars with constant rest masses in general relativity -- Another approach without using the conformally flat condition --
Fumihiko Usui, Yoshiharu Eriguchi
We have computed quasiequilibrium sequences of synchronously rotating compact binary star systems with constant rest masses. This computation has been carried out by using the nume…