A single degenerate model for ultra super-chandrasekhar mass progenitors of type Ia supernovae - Young and low metallicity environments -

Izumi Hachisu, Mariko Kato, Hideyuki Saio, Ken'ichi Nomoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Some Type Ia supernovae (SNe Ia) are suggested to have progenitor white dwarfs (WDs) with mass of up to 2.4-2.8 M, highly exceeding the Chandrasekhar mass limit. We present a new single degenerate (SD) model for SNe Ia progenitors, in which the WD mass can increase by accretion up to 2.3 (2.7) M from the initial value of 1.1 (1.2) M. The results are consistent with high luminosity SNe Ia such as SN 2003fg, SN 2006gz, SN 2007if, and SN 2009dc. There are three characteristic mass ranges of exploding WDs. In an extreme massive case, differentially rotating WDs explode as a SNe Ia soon after the WD mass exceeds 2.4 M because of a secular instability at T/|W|~0.14. For a mid mass range of MWD = 1.5-2.4 M, which is supported by differential rotation, it takes some spinning-down time until carbon is ignited to induce an SN Ia explosion. For a lower mass range of MWD = 1.38-1.5 M , they can be supported by rigid rotation until the angular momentum is lost. We also suggest the ultra super-Chandrasekhar mass SNe Ia are born in young and low metallicity environments.

Original languageEnglish
Title of host publicationBinary Paths to Type Ia Supernovae Explosions
PublisherCambridge University Press
Pages76-79
Number of pages4
EditionS281
ISBN (Print)9781107019812
DOIs
Publication statusPublished - 2011 Jul

Publication series

NameProceedings of the International Astronomical Union
NumberS281
Volume7
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

Keywords

  • Binaries: close - supernovae: individual (SN 2003fg, SN 2006gz, SN 2007if, SN 2009dc)

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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