Hypernovae and Gamma-Ray Bursts

Details Hypernovae and Gamma-Ray Bursts Hypernovae and Gamma-Ray Bursts

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap%26ss.298...81n&link_type=abstract

Astrophysics and Space Science, Volume 298, Issue 1-2, pp. 81-86

Astronomy and Astrophysics

Astrophysics

17

Gamma-Ray Bursts, Supernovae, Nucleosynthesis, Extremely Metal-Poor Stars

Scientific paper

The nature of very energetic supernovae (hypernovae) is discussed. They are the explosive death of stars more massive than ~20 25M &sun;, probably linked to the enigmatic Gamma-Ray Bursts. The optical properties of hypernovae indicate that they are significantly aspherical. Synthetic light curves and late-phase spectra of aspherical supernova/hypernova models are presented. These models can account for the optical observations of SNe 1998bw and 2002ap. The abundance patterns of hypernovae are characterized by large ratios (Zn, Co)/Fe and small ratios (Mn, Cr)/Fe, indicating a significant contribution of hypernovae to the early Galactic chemical evolution.

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