Browsing by Author "Umeda, H"

Now showing items 1-4 of 4

    • Explosive nucleosynthesis in massive Pop III stars and abundances in metal-poor stars and M87 

      Shirouzu, M; Kobayashi, Chiaki; Umeda, H; Nomoto, K (Astronomical Society of the Pacific, 2001)
      In order to understand the elemental abundance pattern observed in galaxies and clusters of galaxies of various metallicity, we investigate stability, evolution and explosion of massive population III stars. We find the ...

    • The origin of the diversity of Type Ia supernovae and the environmental effects 

      Umeda, H; Nomoto, K; Kobayashi, Chiaki; Hachisu, I; Kato, M (1999-09-01)
      Observations suggest that the properties of Type Ia supernovae (SNe Ia) may depend on environmental characteristics, such as the morphology, metallicity, and age of the host galaxies. The influence of these environmental ...

    • Type Ia supernovae and chemical evolution of galaxies 

      Nomoto, K; Umeda, H; Kobayashi, Chiaki (Kluwer, 2002)
      The cosmic/galactic chemical evolutions have been modeled with the early metal enrichment by Type II supernovae (SNe II) and the delayed enrichment of Fe by Type Ia supernovae (SNe Ia). However, the exact nature of SN Ia ...

    • Type Ia supernovae: Progenitors and evolution with redshift 

      Nomoto, K; Umeda, H; Hachisu, I; Kato, M; Tsujimoto, T; Kobayashi, Chiaki (American Institute of Physics (AIP), 2000)
      Relatively uniform light curves and spectral evolution of Type Ia supernovae (SNe Ia) have led to the use of SNe Ia as a "standard candle" to determine cosmological parameters. Whether a statistically significant value of ...