The birth rate of supernovae from double-degenerate and core-degenerate systems
Meng, X.1,2; Yang, W.1,3; Meng, X (reprint author), Henan Polytech Univ, Sch Phys & Chem, Jiaozuo 454000, Peoples R China.
发表期刊ASTRONOMY & ASTROPHYSICS
2012-07
卷号543
DOI10.1051/0004-6361/201218810
收录类别SCI
关键词White Dwarfs Supernovae: General Binaries: General Stars: Evolution
摘要Context. Some recent observations of the delay-time distribution (DTD) of Type Ia supernovae (SNe Ia) seem to uphold the double-degenerate (DD) scenario as the progenitor model of SNe Ia, but the core-degenerate (CD) scenario remains a strong competitor to the DD one. Aims. We investigate the effects of metallicity and the different treatments of common envelope (CE) on the DTD of SNe Ia by considering the DD and CD scenarios, and check the suggestion that the total mass of DD system is the main dependent variable of Phillips relation. Methods. We perform a series of Monte Carlo simulations based on a rapid binary evolution code and consider two treatments of CE evolution, i.e. alpha-formalism and gamma-algorithm. Results. We find that only when the alpha-formalism is considered with a high CE ejection efficiency, may the shape of the DTD for DD systems be consistent with that derived observationally, i.e. a power law of similar to t(-1), while the value of the birth rate of SNe Ia marginally matches observations. For the alpha-formalism with a low CE ejection efficiency and the gamma-algorithm, neither the shape of the DTD nor the value of the birth rate can be compared with those of the observations. Metallicity may not have a significant influence on the shape of DTD, but a lower metallicity may lead to a slightly higher birth rate of SNe Ia by a factor of 2, especially for SNe Ia with long delay times. If the results for the single-degenerate (SD) channel are incorporated into those for the DTD, both the shape of DTD and its value may be closely consistent with observations for SNe Ia younger than 2.5 Gyr, and SD and DD channels provide comparable contributions to the total SNe Ia, while for SNe Ia with delay times longer than 2.5 Gyr, DD is the dominant channel and the birth rate is lower than that derived from observations by a factor up to about four. In addition, we calculate the evolutions of various integral parameters of DD systems, and do not find any one suitable to explain the correlation between the brightness of SNe Ia and its delay time. Moreover, there are three channels producing CD systems that may contribute a few SNe Ia, but the contribution of CD systems to the total SNe Ia is no more than 1%. Conclusions. There may be other channels or mechanisms contributing to SNe Ia with long delay times.
项目资助者Natural Science Foundation of China(11003003) ; Ministry of Education(211102) ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
WOS记录号WOS:000306597200137
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]DELAY-TIME DISTRIBUTION ; CLOSE BINARY EVOLUTION ; COMMON-ENVELOPE PHASE ; FINAL MASS RELATION ; IA SUPERNOVAE ; WHITE-DWARF ; SNE IA ; ELLIPTIC GALAXIES ; PROGENITOR MODEL ; LIGHT CURVES
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被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9431
专题中国科学院天体结构与演化重点实验室
通讯作者Meng, X (reprint author), Henan Polytech Univ, Sch Phys & Chem, Jiaozuo 454000, Peoples R China.
作者单位1.School of Physics and Chemistry, Henan Polytechnic University, 454000 Jiaozuo, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, PR China
3.Department of Astronomy, Beijing Normal University, 100875 Beijing, PR China
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Meng, X.,Yang, W.,Meng, X . The birth rate of supernovae from double-degenerate and core-degenerate systems[J]. ASTRONOMY & ASTROPHYSICS,2012,543.
APA Meng, X.,Yang, W.,&Meng, X .(2012).The birth rate of supernovae from double-degenerate and core-degenerate systems.ASTRONOMY & ASTROPHYSICS,543.
MLA Meng, X.,et al."The birth rate of supernovae from double-degenerate and core-degenerate systems".ASTRONOMY & ASTROPHYSICS 543(2012).
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