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Asymmetric Explosion of Type Ia Supernovae as Seen from Near Infrared Observations
K. Motohara, K. Maeda, C. L. Gerardy +8
We present near-infrared spectra of late phase (>200 d) Type Ia supernovae (SNe Ia) taken at the Subaru telescope. The [Fe II] line of SN 2003hv shows a clear flat-topped feature,…
Galactic chemical evolution: Carbon through Zinc
C. Kobayashi, H. Umeda, K. Nomoto +2
We calculate the evolution of heavy element abundances from C to Zn in the solar neighborhood adopting our new nucleosynthesis yields. Our yields are calculated for wide ranges of…
Chemical Abundances in the Secondary Star of the Black Hole Binary V4641 Sagittarii (SAX J1819.3-2525)
Kozo Sadakane, Akira Arai, Wako Aoki +10
We report on detailed spectroscopic studies performed for the secondary star in the black hole binary (micro-quasar) V4641 Sgr in order to examine its surface chemical composition…
Nucleosynthesis Yields of Core-Collapse Supernovae and Hypernovae, and Galactic Chemical Evolution
Ken'ichi Nomoto, Nozomu Tominaga, Hideyuki Umeda +2
We present new nucleosynthesis yields as functions of the stellar mass, metallicity, and explosion energy (corresponding to normal supernovae and Hypernovae). We apply the results…
Models for the Type Ic Hypernova SN 2003lw associated with GRB 031203
Paolo A. Mazzali, Jinsong Deng, Elena Pian +10
The Gamma-Ray Burst 031203 at a redshift z=0.1055 revealed a highly reddened Type Ic Supernova, SN 2003lw, in its afterglow light. This is the third well established case of a link…
Yields of Population III Supernovae and the Abundance Patterns of Extremely Metal-Poor Stars
Ken'ichi Nomoto, Nozomu Tominaga, Hideyuki Umeda +1
The abundance patterns of extremely metal-poor (EMP) stars provide us with important information on nucleosynthesis in supernovae (SNe) formed in a Pop III or EMP environment, and…
A neutron-star-driven X-ray flash associated with supernova SN 2006aj
Paolo A. Mazzali, Jinsong Deng, Ken'ichi Nomoto +6
Supernovae connected with long-duration gamma-ray bursts (GRBs) are hyper-energetic explosion resulting from the collapse of very massive stars (about 40Mo, where Mo is the mass of…