7 papers
Cooling of Hybrid Stars with a 2SC+ Phase
Tsuneo Noda, Akira Dohi, Nobutoshi Yasutake +3
Recently, Fujimoto, Fukushima & Weise (2019) have proposed a new colour-superconductive state, 2SC+ phase, which can be smoothly connected to the low-density baryon superflui…
Magnetized Coulomb crystals in neutron star crusts
Cheng-Jun Xia, Toshiki Maruyama, Nobutoshi Yasutake +1
We investigate the properties of magnetized Coulomb crystals in neutron star crusts using a fully three-dimensional geometry with periodic boundary conditions. The electron density…
Thermal Spin Polarization Driven by Nuclear Spin-Orbit Coupling in Neutron Star Pasta
Hiroyuki Tajima, Yuta Sekino, Hiroshi Funaki +3
We discuss anomalous spin polarization on the surface of nuclear pasta in a neutron star, driven by a nuclear spin-orbit interaction. We present an effective two-band model of surf…
Multiquark clustering in neutron-star matter from color-spin molecular dynamics
Nobutoshi Yasutake, Yuta Mukobara, Aaron Park +2
We study the equation of state of neutron-star matter with color-spin molecular dynamics. The calculation includes the internal color and spin degrees of freedom and their time evo…
Nonstrange and strange quark matter at finite temperature within modified NJL model and protoquark stars
Wen-Li Yuan, Nobutoshi Yasutake, Renxin Xu
We extend the modified Nambu-Jona-Lasinio (NJL) model -- incorporating exchange interactions via the Fierz transformation -- to finite temperatures in both two- and three-flavor sc…
Gyromagnetic Angular Momentum Interconversion in Neutron Stars
Hiroshi Funaki, Yuta Sekino, Hiroyuki Tajima +3
We propose a novel mechanism for angular momentum (AM) exchange between the crust and core of a neutron star (NS) via the gyromagnetic effect. Using extended hydrodynamics, we mode…