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Exact and approximate expressions of energy generation rates and their impact on the explosion properties of Pair Instability Supernovae
Koh Takahashi, Takashi Yoshida, Hideyuki Umeda +2
Energetics of nuclear reaction is fundamentally important to understand the mechanism of pair instability supernovae (PISNe). Based on the hydrodynamic equations and thermodynamic…
Mass ejection by pulsational pair instability in very massive stars and implications for luminous supernovae
Takashi Yoshida, Hideyuki Umeda, Keiichi Maeda +1
Massive stars having a CO core of 40-60 M experience pulsational pair-instability (PPI) after carbon-burning. This instability induces strong pulsations of the whole…
Nucleosynthesis in neutrino-driven winds in hypernovae
Sho Fujibayashi, Takashi Yoshida, Yuichiro Sekiguchi
We investigate the nucleosynthesis in the neutrino-driven winds blown off from a massive proto-neutron star (mPNS) temporarily formed during the collapse of a $100M_\odo…
Pre-supernova neutrino emissions from ONe cores in the progenitors of core-collapse supernovae: are they distinguishable from those of Fe cores?
Chinami Kato, Milad Delfan Azari, Shoichi Yamada +4
Aiming to distinguish two types of progenitors of core collapse supernovae, i.e., one with a core composed mainly of oxygen and neon (abbreviated as ONe core) and the other with an…
Neutrino-driven explosions of ultra-stripped type Ic supernovae generating binary neutron stars
Yudai Suwa, Takashi Yoshida, Masaru Shibata +2
We study explosion characteristics of ultra-stripped supernovae (SNe), which are candidates of SNe generating binary neutron stars (NSs). As a first step, we perform stellar evolut…