THE HYBRID CONe WD + He STAR SCENARIO FOR THE PROGENITORS OF TYPE Ia SUPERNOVAE

Content Provider	Scilit
Author	Wang, Bo Meng, Xianwei Liu, D. -D. Liu, Zhengwei Han, Zhu
Copyright Year	2014
Description	Journal: The Astrophysical Journal Letters Hybrid CONe white dwarfs (WDs) have been suggested to be possible progenitors of type Ia supernovae (SNe Ia). In this Letter, we systematically studied the hybrid CONe WD + He star scenario for the progenitors of SNe Ia, in which a hybrid CONe WD increases its mass to the Chandrasekhar mass limit by accreting He-rich material from a non-degenerate He star. We obtained the SN Ia birthrates and delay times for this scenario using to a series of detailed binary population synthesis simulations. The SN Ia birthrates for this scenario are ~0.033-0.539 × $10^{–3}$ $yr^{–1}$, which roughly accounts for 1%-18% of all SNe Ia. The estimated delay times are ~28 Myr-178 Myr, which makes these the youngest SNe Ia predicted by any progenitor model so far. We suggest that SNe Ia from this scenario may provide an alternative explanation for type Iax SNe. We also presented some properties of the donors at the point when the WDs reach the Chandrasekhar mass. These properties may be a good starting point for investigating the surviving companions of SNe Ia and for constraining the progenitor scenario studied in this work.
Related Links	http://arxiv.org/pdf/1409.7759 http://iopscience.iop.org/article/10.1088/2041-8205/794/2/L28/pdf
ISSN	20418205
DOI	10.1088/2041-8205/794/2/l28
Journal	The Astrophysical Journal Letters
Issue Number	2
Volume Number	794
Language	English
Publisher	IOP Publishing
Publisher Date	2014-10-09
Access Restriction	Open
Subject Keyword	Journal: The Astrophysical Journal Letters Astronomy and Astrophysics White Dwarfs
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science