scholarly journals Rates and delay times of Type Ia supernovae in the helium-enriched main-sequence donor scenario

2018 ◽  
Vol 475 (4) ◽  
pp. 5257-5267 ◽  
Author(s):  
Zheng-Wei Liu ◽  
Richard J Stancliffe
Keyword(s):  
Main Sequence ◽  
Type Ia Supernovae ◽  
Delay Times ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Helium Star Donor Channel to Type Ia Supernovae and Their Surviving Companion Stars

2011 ◽  
Vol 7 (S281) ◽  
pp. 205-208
Author(s):  
Bo Wang ◽  
Zhanwen Han
Keyword(s):  
Main Sequence ◽  
Type Ia Supernovae ◽  
Population Synthesis ◽  
Short Delay ◽  
Delay Times ◽  
Spatial Velocity ◽  
Type Ia ◽  
Helium Star ◽  
Ia Supernovae ◽  
Synthesis Approach

AbstractEmploying Eggleton's stellar evolution code and assuming optically thick winds, we systematically studied the He star donor channel of Type Ia supernovae (SNe Ia), in which a carbon-oxygen white dwarf (WD) accretes material from a He main-sequence star or a He subgiant to increase its mass to the Chandrasekhar mass. We mapped out the initial parameters for producing SNe Ia in the orbital period–secondary mass plane for various WD masses from this channel. Based on a detailed binary population synthesis approach, we find that this channel can produce SNe Ia with short delay times (~100 Myr) implied by recent observations. We derived many properties of the surviving companions of this channel after SN explosion, which can be tested by future observations. We also find that the surviving companions from the SN explosion scenario have a high spatial velocity (>400 km/s), which could be an alternative origin for hypervelocity stars (HVSs), especially for HVSs such as US 708.

WD+AGB star systems as the progenitors of type Ia supernovae

2018 ◽  
Vol 14 (S343) ◽  
pp. 540-541
Author(s):  
Bo Wang
Keyword(s):  
Type Ia Supernovae ◽  
Population Synthesis ◽  
Final Phase ◽  
Common Envelope ◽  
The Core ◽  
Delay Times ◽  
Careful Treatment ◽  
Type Ia ◽  
Ia Supernovae ◽  
Synthesis Approach

AbstractWD+AGB star systems have been suggested as an alternative way for producing type Ia supernovae (SNe Ia), known as the core-degenerate (CD) scenario. In the CD scenario, SNe Ia are produced at the final phase during the evolution of common-envelope through a merger between a carbon-oxygen (CO) WD and the CO core of an AGB secondary. However, the rates of SNe Ia from this scenario are still uncertain. In this work, I carried out a detailed investigation on the CD scenario based on a binary population synthesis approach. I found that the Galactic rates of SNe Ia from this scenario are not more than 20% of total SNe Ia due to more careful treatment of mass transfer, and that their delay times are in the range of ∼90 − 2500 Myr, mainly contributing to the observed SNe Ia with short and intermediate delay times.

scholarly journals A closer look at non-interacting He stars as a channel for producing the old population of type Ia supernovae

2020 ◽  
Vol 641 ◽  
pp. A20
Author(s):  
Zhengwei Liu ◽  
Richard J. Stancliffe
Keyword(s):  
Binary Systems ◽  
Type Ia Supernovae ◽  
Population Synthesis ◽  
Thermonuclear Explosion ◽  
Delay Times ◽  
Type Ia ◽  
Binary Evolution ◽  
Chandrasekhar Limit ◽  
Ia Supernovae ◽  
Almost All

The nature of the progenitors of type Ia supernovae (SNe Ia) remains a mystery. Binary systems consisting of a white dwarf (WD) and a main-sequence (MS) donor are potential progenitors of SNe Ia, in which a thermonuclear explosion of the WD may occur when its mass reaches the Chandrasekhar limit during accretion of material from a companion star. In the present work, we address theoretical rates and delay times of a specific MS donor channel to SNe Ia, in which a helium (He) star + MS binary produced from a common envelope event subsequently forms a WD + MS system without the He star undergoing mass transfer by Roche lobe overflow. By combining the results of self-consistent binary evolution calculations with population synthesis models, we find that the contribution of SNe Ia in this channel is around 2.0 × 10−4 yr−1. In addition, we find that delay times of SNe Ia in this channel cover a range of about 1.0–2.6 Gyr, and almost all SNe Ia produced in this way (about 97%) have a delay time of ≳1 Gyr. While the rate of SN Ia in this work is about 10% of the overall SN Ia rate, the channel represents a possible contribution to the old population (1–3 Gyr) of observed SNe Ia.

scholarly journals Effect of Cosmic Mean Metallicity on the Supernovae Cosmology

2021 ◽  
Vol 162 (6) ◽  
pp. 249
Author(s):  
Gexing Li ◽  
Zhihong Li
Keyword(s):  
Chemical Evolution ◽  
Cosmological Parameters ◽  
Type Ia Supernovae ◽  
Delay Times ◽  
Standard Candle ◽  
Type Ia ◽  
Ia Supernovae

Abstract The initial metallicity of Type Ia Supernovae (SNe Ia) progenitor that is increasing with the cosmological chemical evolution will directly lead to a decrease of the 56Ni formed during the nucleosynthesis and then a varying standard candle. The variation may seriously affect our understanding of the evolving universe. In this work, we derived the relationships between 56Ni yield and metallicity in different progenitor channels. The evolution of the cosmic mean metallicity (CMM) was used to estimate the initial metallicity of progenitors. The effect of the delay times from the birth of progenitors to their explosion was also considered. The corrections of SNe Ia luminosity were estimated and the influences of the different progenitor channels and CMM evolution rates were examined. Several important cosmological parameters were updated according to the luminosity corrections.

scholarly journals EVOLVING TO TYPE Ia SUPERNOVAE WITH SHORT DELAY TIMES

2009 ◽  
Vol 701 (2) ◽  
pp. 1540-1546 ◽  
Author(s):  
Bo Wang ◽  
Xuefei Chen ◽  
Xiangcun Meng ◽  
Zhanwen Han
Keyword(s):  
Type Ia Supernovae ◽  
Short Delay ◽  
Delay Times ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals RATES AND DELAY TIMES OF TYPE Ia SUPERNOVAE

2009 ◽  
Vol 699 (2) ◽  
pp. 2026-2036 ◽  
Author(s):  
Ashley J. Ruiter ◽  
Krzysztof Belczynski ◽  
Chris Fryer
Keyword(s):  
Type Ia Supernovae ◽  
Delay Times ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals The progenitors of Type Ia supernovae with long delay times

2010 ◽  
Vol 401 (4) ◽  
pp. 2729-2738 ◽  
Author(s):  
Bo Wang ◽  
Xiang-Dong Li ◽  
Zhan-Wen Han
Keyword(s):  
Type Ia Supernovae ◽  
Delay Times ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Hot subdwarfs from the surviving companions of the white dwarf + main-sequence channel of Type Ia supernovae

2021 ◽  
Vol 507 (3) ◽  
pp. 4603-4617
Author(s):  
Xiang-Cun Meng ◽  
Yang-Ping Luo
Keyword(s):  
White Dwarf ◽  
Birth Rate ◽  
Main Sequence ◽  
Space Velocity ◽  
Type Ia Supernovae ◽  
Population Synthesis ◽  
Parameter Spaces ◽  
Type Ia ◽  
Hot Subdwarfs ◽  
Ia Supernovae

ABSTRACT Some surviving companions of Type Ia supernovae (SNe Ia) from the white dwarf + main-sequence (WD+MS) channel may evolve to hot subdwarfs. In this paper, we perform stellar evolution calculations for the surviving companions of close WD+MS systems in the spin-up/spin-down model and the canonical non-rotating model. This enables us to map out the initial parameter spaces in the orbital period–secondary-mass plane in which the surviving companions can evolve to hot subdwarfs. Based on these results, we carry out a series of binary population synthesis calculations to obtain the Galactic birth rate of hot subdwarfs from the WD+MS channel, which is $2.3{-}6\times 10^{\rm -4}\, {\rm yr}^{\rm -1}$ for the spin-up/spin-down model and $0.7{-}3\times 10^{\rm -4}\, {\rm yr}^{\rm -1}$ for the canonical non-rotating model. We also show the distributions of some integral properties of the hot subdwarfs, for example the mass and space velocity, for different models. In addition, by comparing our results with observations of intermediate helium-rich (iHe-rich) hot subdwarfs, we find that the hot subdwarfs from the WD+MS channel may explain some observational features of the iHe-rich hot subdwarfs, especially those from the spin-up/spin-down model. Although we expect that the SN Ia channel will contribute only a small fraction of the iHe-rich hot subdwarf population, some of these may help to explain cases with unusual kinematics.

scholarly journals Delay times and rates for Type Ia supernovae and thermonuclear explosions from double-detonation sub-Chandrasekhar mass models

2011 ◽  
Vol 417 (1) ◽  
pp. 408-419 ◽  
Author(s):  
A. J. Ruiter ◽  
K. Belczynski ◽  
S. A. Sim ◽  
W. Hillebrandt ◽  
C. L. Fryer ◽  
...  
Keyword(s):  
Type Ia Supernovae ◽  
Delay Times ◽  
Type Ia ◽  
Ia Supernovae
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