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Abundance Profiling of Extremely Metal-Poor Stars and Supernova Properties in the Early Universe
Nozomu Tominaga, Nobuyuki Iwamoto, Ken'ichi Nomoto
After the Big Bang nucleosynthesis, the first heavy element enrichment in the Universe was made by a supernova (SN) explosion of a population (Pop) III star (Pop III SN). The abund…
Supernova Explosions of Super-Asymptotic Giant Branch Stars: Multicolor Light Curves of Electron-Capture Supernovae
Nozomu Tominaga, Sergei I. Blinnikov, Ken'ichi Nomoto
An electron-capture supernova (ECSN) is a core-collapse supernova (CCSN) explosion of a super-asymptotic giant branch (SAGB) star with a main-sequence mass $M_{\rm ms}\sim7-9.5M_\o…
Chemical Analysis of the Ninth Magnitude Carbon-Enhanced Metal-Poor Star BD+44 493
H. Ito, W. Aoki, T. C. Beers +2
We present detailed chemical abundances for the bright carbon-enhanced metal-poor (CEMP) star BD+44 493, previously reported on by Ito et al. Our measurements confirm that BD+44 49…
Early UV/Optical Emission of The Type Ib SN 2008D
Melina C. Bersten, Masaomi Tanaka, Nozomu Tominaga +2
We propose an alternative explanation for the post-breakout emission of SN 2008D associated with the X-ray transient 080109. Observations of this object show a very small contrast…