82 citations · 467 across the 20 of their papers we have counts for
10 papers · 1 filter
Monotonicity of the cores of massive stars
Koh Takahashi, Tomoya Takiwaki, Takashi Yoshida
Massive stars are linked with diverse astronomical processes and objects including star formation, supernovae and their remnants, cosmic rays, interstellar media, and galaxy evolut…
Stability analysis of supermassive primordial stars: a new mass range for general relativistic instability supernovae
Chris Nagele, Hideyuki Umeda, Koh Takahashi +2
Observed supermassive black holes in the early universe have several proposed formation channels, in part because most of these channels are difficult to probe. One of the more pro…
Stellar models of Betelgeuse constrained using observed surface conditions
Tianyin Luo, Hideyuki Umeda, Takashi Yoshida +1
We study stellar models for Betelgeuse using the HR diagram and surface abundances as observational constraints. Previous studies on Betelgeuse have not systematically investigated…
A three-dimensional hydrodynamics simulation of oxygen-shell burning in the final evolution of a fast-rotating massive star
Takashi Yoshida, Tomoya Takiwaki, David R. Aguilera-Dena +5
We perform for the first time a 3D hydrodynamics simulation of the evolution of the last minutes pre-collapse of the oxygen shell of a fast-rotating massive star. This star has an…
Three-dimensional Hydrodynamics Simulations of Precollapse Shell Burning in the Si- and O-rich Layers
Takashi Yoshida, Tomoya Takiwaki, Kei Kotake +3
We present 3D hydrodynamics simulations of shell burning in two progenitors with zero-age main-sequence masses of 22 and 27 for 65 and 200 s up to the onset of gr…
The possible role of stellar mergers for the formation of multiple stellar populations in globular clusters
Long Wang, Pavel Kroupa, Koh Takahashi +1
Many possible scenarios for the formation of multiple stellar populations (MSP) in globular clusters (GCs) have been discussed so far, including the involvement of asymptotic giant…