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.
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Hydrodynamic simulations unravel the progenitor-supernova-remnant connection in SN 1987A
Salvatore Orlando,Masaomi Ono,Shigehiro Nagataki,Marco Miceli,Marco Miceli,Hideyuki Umeda,Gilles Ferrand,Fabrizio Bocchino,Oleh Petruk,Giovanni Peres,Giovanni Peres,Koh Takahashi,Takashi Yoshida +12 more
TL;DR: In this paper, a 3D hydrodynamic simulation of the parent aspherical SN explosion and the internal structure of its progenitor star is presented, where the dynamics and radiative properties of the remnant of SN 1987A are linked to the geometrical and physical characteristics of parent SN explosion.
Posted Content
Axion Mass Limits from Cooling Neutron Stars
TL;DR: In this article, the thermal evolution of a neutron star was studied by including the energy loss due to axion emission, and the upper limits on the axion mass were found to be $m_a < 0.06 - 0.3$ eV and 0.08$ -$ 0.8 eV for the KSVZ and DFSZ axion models, respectively, with the soft equation of state giving the most stringent limits.
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The Ejection of Relativistic Bullets from Supernovae and the Generation of Gamma-Ray Bursts.
TL;DR: This work studies the possibility that some GRBs are produced along with relativistic matter ejected from supernovae, and finds that, in general, the cross section of the matter has to be very small compared with the progenitor's radius, and thus the matter having to be bullet-like rather than shell-like.
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Nucleosynthesis in black-hole-forming supernovae and extremely metal-poor stars
TL;DR: In this paper, the nucleosynthesis features of black-hole-forming supernovae were analyzed and it was shown that the abundance pattern of the recently discovered most Fe deficient star, HE0107-5240, and other extremely metal-poor carbon-rich stars are in good accord with those of blackhole forming supernova, but not pair-instability supernova.