H
Hideyuki Umeda
Researcher at University of Tokyo
Publications - 223
Citations - 16386
Hideyuki Umeda is an academic researcher from University of Tokyo. The author has contributed to research in topics: Supernova & Stars. The author has an hindex of 52, co-authored 212 publications receiving 15054 citations.
Papers
More filters
Formation of first star clusters under the supersonic gas flow -- I. Morphology of the massive metal-free gas cloud
TL;DR: In this article , the authors performed simulations of the first star formation with initial supersonic gas flows relative to the dark matter at the cosmic recombination era and found that increasing the initial streaming velocities led to delayed halo formation and increased halo mass, enhancing the mass of the gravitationally shrinking gas cloud.
Journal ArticleDOI
Forbidden transitions in nuclear weak processes relevant to neutrino detection, nucleosynthesis and evolution of stars
TL;DR: In this paper, the distribution of spin-dipole strengths in 16 O and neutrino-induced reactions on 16 O are investigated by shell model calculations with new shell-model Hamiltonians.
Journal ArticleDOI
Evolution of stars just below the critical mass for iron core formation
TL;DR: In this paper, the evolution of stars with their initial mass of 9-11M under a very fine initial mass grid of 0.01M⊙ was calculated, and the lower critical mass for Ne ignition in an ONe core that has not undergone the thermal pulse episode was determined.
Stability analysis of population III supermassive stars: a new mass range for general relativistic instability supernovae.
TL;DR: In this paper , the authors developed a straightforward method for evaluating the general relativistic radial instability without simplifying assumptions and applied it to population III supermassive stars taken from a post Newtonian stellar evolution code.
Book ChapterDOI
Neutrinos from Presupernova Stars
TL;DR: In this paper, the neutrino events can be applied to an alarm of a supernova, and the supernova alarm will be sent before a few to more than ten hours before the super-nova explosion by KamLAND.