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EC-SNe FROM SUPER-ASYMPTOTIC GIANT BRANCH PROGENITORS: THEORETICAL MODELS VERSUS OBSERVATIONS

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M. L. Pumo1,2, M. Turatto2, M. T. Botticella3, A. Pastorello3, S. Valenti3, L. Zampieri1, S. Benetti1, E. Cappellaro1 and F. Patat4

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Using a parametric approach, we determine the configuration of super-asymptotic giant branch (super-AGB) stars at the explosion as a function of the initial mass and metallicity, in order to verify if the electron-capture supernova (EC-SN) scenario involving a super-AGB star is compatible with the observations regarding SN2008ha and SN2008S. The results show that both the supernovae (SNe) can be explained in terms of EC-SNe from super-AGB progenitors having a different configuration at the collapse. The impact of these results on the interpretation of other subluminous SNe is also discussed.


Keywords

stars: AGB and post-AGB; stars: evolution; supernovae: general; supernovae: individual (SN2008ha, SN2008S)


PACS

97.20.Li Giant and subgiant stars

97.10.Cv Stellar structure, interiors, evolution, nucleosynthesis, ages

97.60.Bw Supernovae

97.10.Nf Masses

Subjects

Astrophysics and astroparticles

Dates

Issue 2 (2009 November 10)

Received 2009 July 22, accepted for publication 2009 October 2

Published 2009 October 21



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