Impact of convective overshooting on the single-degenerate model of Type Ia supernovae
文献类型：期刊论文
| 作者 | Wang XH(王行欢)1,2 ; Meng XC(孟祥存)2
|
| 刊名 | Astronomy and Astrophysics
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 699 |
| 关键词 | binaries: close supernovae: general white dwarfs |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202554449 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Journal article (JA) |
| 英文摘要 | Context. The single-degenerate (SD) model is one of the principal models for the progenitors of Type Ia supernovae (SNe Ia). However, it faces some challenges, the primary being its inability to account for the observed SN Ia birth rate. Many studies have attempted to address this issue by expanding the parameter space, defined by the initial donor star mass and orbital period, that can lead to SNe Ia, as well as by improving binary population synthesis. While these efforts have led to significant progress, many uncertainties in stellar physics persist, which influences the outcomes of such studies. Convective overshooting, which can significantly affect the internal structure of a star and subsequently its evolution within a binary system, is one of the most significant sources of uncertainty in stellar physics. Aims. We investigate the effect of convective overshooting on the parameter space and birth rate of SNe Ia within the SD model. Methods. We employed the common-envelope wind (CEW) model, a new version of the SD model, as our progenitor model. Using MESA, we obtained the parameter space that leads to SNe Ia for three different convective overshooting parameters and calculated the corresponding SN Ia birth rate. Results. Convective overshooting expands the upper boundaries (corresponding to a larger initial donor mass) and right boundaries (corresponding to a longer initial orbital period) of the parameter space for systems with massive white dwarfs (WDs; ≥ ¥0.75 M·). However, the minimum WD mass and the parameter space for low-mass WDs- and, consequently, the calculated SN Ia birth rate -vary non-monotonically with convective overshooting parameters. The CEW model may explain the SNe Ia that interact with the circumstellar medium (CSM), i.e., SNe Ia-CSM. We find that the parameter space for SNe Ia-CSM increases with convective overshooting parameters, as does their birth rate. © 2025 The Authors. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 资助项目 | National Natural Science Foundation of China[12288102];National Natural Science Foundation of China[12333008] |
| 语种 | 英语 |
| 资助机构 | National Natural Science Foundation of China[12288102, 12333008] |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28411]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing, 100049, China 2.International Centre of Supernovae (ICESUN), Yunnan Key Laboratory of Supernova Research, Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, 650216, China; |
| 推荐引用方式 GB/T 7714 | Wang XH,Meng XC. Impact of convective overshooting on the single-degenerate model of Type Ia supernovae[J]. Astronomy and Astrophysics,2025,699. |
| APA | 王行欢,&孟祥存.(2025).Impact of convective overshooting on the single-degenerate model of Type Ia supernovae.Astronomy and Astrophysics,699. |
| MLA | 王行欢,et al."Impact of convective overshooting on the single-degenerate model of Type Ia supernovae".Astronomy and Astrophysics 699(2025). |
入库方式： OAI收割
来源：云南天文台
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