Core-collapse supernova diversities From the weakest to most powerful explosions

K. Maeda, T. Moriya, K. Kawabata, Masaomi Tanaka, N. Tominaga, K. Nomoto

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

Core-collapse supernovae (CC-SNe) show a large variety in their observational properties. Their peak luminosities range from MV ∼ -14 mag to ∼ -21 mag. The 'faint' and 'bright' SNe show diversities even within the individual luminosity classes. Faint SNe include SNe IIp, peculiar SNe Ib 2005E/2005cz, and even more peculiar SN 2008ha. For this faint class, we propose a scenario that they are outcomes of a low-energy explosion of a star with the main-sequence mass, MZAMS, in the range of ∼ 8 ∼ 5M. Bright SNe also show diversities in their light curves and spectra. SN Ic 2007bi is the most solid case in which a large amount of 56Ni, ∼ 5 - 10M, is ejected. We show that not only a pair-instability SN (MZAMS ∼ 200 300M) but also an Fe-core-collapse SN (MZAMS ∼ 100M) can reproduce its observed behaviors. Finally, the diversity in the luminosity of SNe associated with Gamma-ray bursts is discussed.We suggest that a variety in the jet-induced mechanism (i.e., the duration for which the engine works) as a possible cause of the observed diversity.

Original languageEnglish
Pages (from-to)264-271
Number of pages8
JournalMemorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement
Volume83
Issue number1
Publication statusPublished - 2012 Jan 1
Externally publishedYes
EventWorkshop on Multifrequency Behaviour of High Energy Cosmic Sources - Vulcano, Sicily, Italy
Duration: 2011 May 232011 May 28

Keywords

  • Abundances: Gamma-ray
  • Bursts
  • General: Nuclear reactions
  • Nucleosynthesis
  • Supernovae

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Radiology Nuclear Medicine and imaging
  • Astronomy and Astrophysics
  • Instrumentation
  • Atomic and Molecular Physics, and Optics

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