activity
19972025
most citedThe black hole bomb and superradiant instabilities

374 citations · 2.5k across the 51 of their papers we have counts for

collaborators

51 papers

gr-qc2025

Magnetically supramassive and hypermassive compact stars

Koji Uryu, Shijun Yoshida, Eric Gourgoulhon +6

It is known that the mass of magnetized relativistic compact star is larger than that of non-magnetized one for the same equation of state and central density, albeit the excess of…

astro-ph.HE2023

How different is the magnetic field at the core-crust interface from that at the neutron star surface? -- the range allowed in magnetoelastic equilibrium

Yasufumi Kojima, Shijun Yoshida

This study was focused on the investigation of a magnetic field penetrating from the core of a neutron star to its surface. The range of possible field configurations in the interm…

gr-qc2023★ 6 cited

Equilibriums of extremely magnetized compact stars with force-free magnetotunnels

Koji Uryu, Shijun Yoshida, Eric Gourgoulhon +5

We present numerical solutions for stationary and axisymmetric equilibriums of compact stars associated with extremely strong magnetic fields. The interior of the compact stars is…

gr-qc2019★ 34 cited

New code for equilibriums and quasiequilibrium initial data of compact objects. IV. Rotating relativistic stars with mixed poloidal and toroidal magnetic fields

Koji Uryu, Shijun Yoshida, Eric Gourgoulhon +5

A new code for computing fully general relativistic solutions of strongly magnetized rapidly rotating compact stars is developed as a part of the COCAL (Compact Object CALculator)…

gr-qc2018★ 9 cited

Stably stratified stars containing magnetic fields whose toroidal components are much larger than the poloidal ones in general relativity: A perturbation analysis

Shijun Yoshida

We construct the stably stratified magnetized stars within the framework of general relativity. The effects of magnetic fields on the structure of the star and spacetime are treate…

gr-qc2016★ 111 cited

Tidal deformability and I-Love-Q relations for gravastars with polytropic thin shells

Nami Uchikata, Shijun Yoshida, Paolo Pani

The moment of inertia, the spin-induced quadrupole moment, and the tidal Love number of neutron-star and quark-star models are related through some relations which depend only mild…