36 citations · 39 across the 4 of their papers we have counts for
4 papers
A Lagrangian construction of rotating stars
Misa Ogata, Hirotada Okawa, Kotaro Fujisawa +3
We present a new formulation for numerically obtaining axisymmetric equilibrium structures of rotating stars in two spatial dimensions. With a view to apply it to the secular evolu…
A novel formulation for the evolution of relativistic rotating stars
Hirotada Okawa, Kotaro Fujisawa, Nobutoshi Yasutake +3
We present a new formulation to construct numerically equilibrium configurations of rotating stars in general relativity. Having in mind the application to their quasi static evolu…
Singularity-Avoiding Multi-Dimensional Root-Finder
Hirotada Okawa, Kotaro Fujisawa, Yu Yamamoto +3
We proposed in this paper a new method, which we named the W4 method, to solve nonlinear equation systems. It may be regarded as an extension of the Newton-Raphson~(NR) method to b…
Observability of inflated companion stars after supernovae in massive binaries
Misa Ogata, Ryosuke Hirai, Kotaro Hijikawa
We carry out a systematic study of the response of companion stars in massive binaries after being impacted by supernova ejecta. A total of 720 1D stellar evolution calculations ar…