321 citations · 1k across the 9 of their papers we have counts for
9 papers
Nebular Nitrogen Line Emission in Stripped-Envelope Supernovae -- a New Progenitor Mass Diagnostic
Stan Barmentloo, Anders Jerkstrand, Koichi Iwamoto +4
Nitrogen is produced by CNO-cycling in massive stars, and can be ejected in significant amounts in supernova explosions. While in H-rich SNe, its [\ion{N}{II}] 6548, 6583 emission…
The r-Process in Supersonic Neutrino-Driven Winds: The Roll of Wind Termination Shock
Takami Kuroda, Shinya Wanajo, Ken'ichi Nomoto
Recent hydrodynamic studies of core-collapse supernovae imply that the neutrino-heated ejecta from a nascent neutron star develops to supersonic outflows. These supersonic winds ar…
Spectroscopic Studies of Extremely Metal-Poor Stars with the Subaru High Dispersion Spectrograph. IV. The alpha-Element-Enhanced Metal-Poor Star BS16934-002
Wako Aoki, Satoshi Honda, Timothy C. Beers +7
A detailed elemental abundance analysis has been carried out for the very metal-poor ([Fe/H]=-2.7) star BS16934-002, which was identified in our previous work as a star exhibiting…
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…
Composition of the Innermost Core Collapse Supernova Ejecta
C. Frohlich, P. Hauser, M. Liebendoerfer +8
With presently known input physics and computer simulations in 1D, a self-consistent treatment of core collapse supernovae does not yet lead to successful explosions, while 2D mode…
Explosive Nucleosynthesis in Hypernovae
Takayoshi Nakamura, Hideyuki Umeda, Koichi Iwamoto +4
We examine the characteristics of nucleosynthesis in 'hypernovae', i.e., supernovae with very large explosion energies ($ \gsim 10^{52} $ ergs). We carry out detailed nucleosynthes…
A Spectroscopic Analysis of the Energetic Type Ic `Hypernova' SN 1997ef
Paolo A. Mazzali, Koichi Iwamoto, Ken'ichi Nomoto
The properties of the bright and energetic Type Ic SN 1997ef are investigated using a Monte Carlo spectrum synthesis code. Analysis of the earliest spectra is used to determine the…
A Model for the Quiescent Phase of the Recurrent Nova U Scorpii
Izumi Hachisu, Mariko Kato, Taichi Kato +2
A theoretical light curve is constructed for the quiescent phase of the recurrent nova U Scorpii in order to resolve the existing distance discrepancy between the outbursts (6 kpc)…
Nucleosynthesis in Type Ia Supernovae
K. Nomoto, K. Iwamoto, N. Nakasato +5
Among the major uncertainties involved in the Chandrasekhar mass models for Type Ia supernovae are the companion star of the accreting white dwarf (or the accretion rate that deter…