2013A&A...559A..94W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST23:15:32

2013A&A...559A..94W - Astronomy and Astrophysics, volume 559A, 94-94 (2013/11-1)

Producing Type Iax supernovae from a specific class of helium-ignited WD explosions.

WANG B., JUSTHAM S. and HAN Z.

Abstract (from CDS):

It has recently been proposed that one subclass of Type Ia supernovae (SNe Ia) is sufficiently distinct and sufficiently common to be classified separately from the bulk of SNe Ia; the suggested class name is Type Iax supernovae (SNe Iax), after SN 2002cx. However, their progenitors are still uncertain. We study whether the population properties of this class might be understood if the events originate from a subset of sub-Chandrasekhar mass explosions. In this potential progenitor population, a carbon-oxygen white dwarf (CO WD) accumulates a helium layer from a non-degenerate helium star; ignition of that helium layer then leads to ignition of the CO WD. We incorporated detailed binary evolution calculations for the progenitor systems into a binary population synthesis model to obtain rates and delay times for these events. The predicted Galactic event rate of these explosions is ∼1.5x10–3yr–1 according to our standard model, in good agreement with the measured rates of SNe Iax. In addition, predicted delay times are ∼70Myr-800Myr, consistent with the fact that most of SNe Iax have been discovered in late-type galaxies. If the explosions are assumed to be double detonations - following current model expectations - then, based on the CO WD masses at explosion, we also estimate the distribution of resulting SN brightness (-13>Mbol>-19mag), which can reproduce the empirical diversity of SNe Iax. We speculate on why binaries with non-degenerate donor stars might lead to SNe Iax if similar systems with degenerate donors do not. We suggest that the high mass of the helium layer necessary for ignition at the lower accretion rates typically delivered from non-degenerate donors might be necessary to produce SN 2002cx-like characteristics, perhaps even by changing the nature of the CO ignition.

Abstract Copyright:

Journal keyword(s): binaries: close - stars: evolution - supernovae: general

Simbad objects: 9

goto Full paper

goto View the reference in ADS

Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 2008ge SN* 04 08 24.68 -47 53 47.4           SNIapec 49 1
2 HD 49798 HXB 06 48 04.7000758397 -44 18 58.432035331 6.758 8.017 8.287 8.391 8.543 sdO6 283 0
3 V* V445 Pup No* 07 37 56.8797662756 -25 56 58.836792684           ~ 141 0
4 US 708 HS* 09 33 20.8630614743 +44 17 05.503100302   18.5 18.8     sdOHe 71 0
5 SN 2002cx SN* 13 13 49.72 +06 57 31.9   17.68       SNIapec 193 1
6 CD-30 11223 HS* 14 11 16.1539612427 -30 53 03.692295694   11.90 11.90     sdB+DA 42 0
7 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0
8 KPD 1930+2752 HS* 19 32 14.8086352823 +27 58 35.444970697 12.80 13.75 13.82     sdB 144 0
9 SN 2008ha SN* 23 34 52.69 +18 13 35.4           SNIax 149 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2013A&A...559A..94W and select 'bookmark this link' or equivalent in the popup menu


2020.07.03-23:15:32

© Université de Strasbourg/CNRS

    • Contact