2015A&A...576A..86W


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET00:49:06

2015A&A...576A..86W - Astronomy and Astrophysics, volume 576A, 86-86 (2015/4-1)

Super-Eddington wind scenario for the progenitors of Type Ia supernovae: binary population synthesis calculations.

WANG B., MA X., LIU D.-D., LIU Z.-W., WU C.-Y., ZHANG J.-J. and HAN Z.

Abstract (from CDS):

The super-Eddington wind scenario has been proposed as an alternative way for producing type Ia supernovae (SNe Ia). The super-Eddington wind can naturally prevent the carbon-oxygen white dwarfs (CO WDs) with high mass-accretion rates from becoming red-giant-like stars. Furthermore, it works in low-metallicity environments, which may explain SNe Ia observed at high redshifts. In this article, we systematically investigated the most prominent single-degenerate WD+MS channel based on the super-Eddington wind scenario. We combined the Eggleton stellar evolution code with a rapid binary population synthesis (BPS) approach to predict SN Ia birthrates for the WD+MS channel by adopting the super-Eddington wind scenario and detailed mass-accumulation efficiencies of H-shell flashes on the WDs. Our BPS calculations found that the estimated SN Ia birthrates for the WD+MS channel are ∼0.009-0.315x10–3yr–1 if we adopt the Eddington accretion rate as the critical accretion rate. These rates are much lower than those of the observations (<10% of the observed SN Ia birthrates). This indicates that the WD+MS channel only contributes a small portion of all SNe Ia. The birthrates in this simulation are lower than those of previous studies, the main reason for which is that new mass-accumulation efficiencies of H-shell flashes are adopted. We also found that the critical mass-accretion rate has significant influence on the birthrates of SNe Ia. Meanwhile, the results of our BPS calculations are sensitive to the values of the common-envelope ejection efficiency.

Abstract Copyright:

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

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1085 1
2 2MASS J00252358+6408019 * 00 25 23.5961842142 +64 08 02.027493332   20.1 18.7     F8V 41 0
3 SS 433 HXB 19 11 49.5645897700 +04 58 57.824087535   16.3 13.0     A7Ib: 1943 3
4 V* V1341 Cyg LXB 21 44 41.1544523872 +38 19 17.065856122 15.00 15.13 14.68 15.00   A9III 1081 1

    Equat.    Gal    SGal    Ecl

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2020.11.28-00:49:06

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