Violent mergers of nearly equal-mass white dwarf as progenitors of subluminous Type Ia supernovae
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In this paper, the authors investigated whether violent mergers of two white dwarfs of 0.9 M� could lead to subluminous Type Ia supernovae that resemble 1991bg-like SNe Ia events.Abstract:
Context. The origin of subluminous Type Ia supernovae (SNe Ia) has long eluded any explanation, because all Chandrasekhar-mass models have severe problems reproducing them. Recently, it has been proposed that violent mergers of two white dwarfs of 0.9 M� could lead to subluminous SNe Ia events that resemble 1991bg-like SNe Ia. Aims. Here we investigate whether this scenario still works for mergers of two white dwarfs with a mass ratio below one. We aim to determine the range of mass ratios for which a detonation still forms during the merger, as only those events will lead to an SN Ia. This range is an important ingredient for population synthesis and one decisive point for judging the viability of the scenario. In addition, we perform a resolution study of one of the models. Finally we discuss the connection between violent white dwarf mergersread more
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NORMAL TYPE Ia SUPERNOVAE FROM VIOLENT MERGERS OF WHITE DWARF BINARIES
Ruediger Pakmor,Markus Kromer,S. Taubenberger,Stuart A. Sim,Friedrich K. Röpke,Wolfgang Hillebrandt +5 more
TL;DR: In this paper, a simulation of a violent merger of two carbon-oxygen white dwarfs with masses of 0.9 M and 1.1 M was presented, where a well-tested combination of codes was used to study the system.
Journal ArticleDOI
Progenitors of type Ia supernovae
Bo Wang,Zhanwen Han +1 more
TL;DR: In this article, the authors review various progenitor models proposed in the past few years and summarize many observational results that can be used to put constraints on the nature of their progenitors.
Journal ArticleDOI
Towards an understanding of Type Ia supernovae from a synthesis of theory and observations
TL;DR: In this article, the authors summarize new observational constraints, address recent progress in modeling Type Ia supernovae by means of three-dimensional hydrodynamic simulations, and discuss several of the still open questions.
Journal ArticleDOI
Progenitors of type Ia supernovae
Bo Wang,Zhanwen Han +1 more
TL;DR: In this article, the authors review various progenitor models proposed in the past years and summarize many observational results that can be used to put constraints on the nature of their progenitors.
Journal ArticleDOI
Theoretical uncertainties of the Type Ia supernova rate
TL;DR: In this article, a binary population synthesis code was used to study the main evolutionary channels that lead to Type Ia supernovae and the associated delay-time distributions, and it was shown that the double degenerate (DD) channel is the dominant formation channel for the longest delay times.
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