Mixing fraction in classical novae | |
Guo YL(郭云浪)1,2; Wu CY(吴程远)1,2; Wang B(王博)1,2 | |
刊名 | ASTRONOMY & ASTROPHYSICS |
2022-04-12 | |
卷号 | 660 |
关键词 | novae, cataclysmic variables white dwarfs |
ISSN号 | 0004-6361 |
DOI | 10.1051/0004-6361/202142163 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Context. Classical novae are powered by thermonuclear runaways occurring on the surface of accreting white dwarfs (WDs). In the observations, the enrichments of heavy elements in nova ejecta have been detected, indicating a mixing process between the accreted matter and the matter from the outer layers of the underlying WDs prior to nova outbursts. However, the mixing fraction in classical novae is still uncertain. Aims. The purpose of this article is to investigate some elemental abundance ratios during nova outbursts that can be used to estimate the WD mixing fraction in classical novae. Methods. By considering different WD mixing fractions with the stellar evolution code Modules for Experiments in Stellar Astrophysics, we carried out a series of simulations of nova outbursts, in which the initial CO WD masses range from 0.7-1.0 M-circle dot. Results. We identified four elemental abundance ratios (i.e. (H + He)/ Sigma CNO, (H + He)/Ne, Sigma CNO/Mg, and Sigma CNO/Si) that satisfy the conditions for determining the WD mixing fraction, in which (H + He)/ Sigma CNO is the most suitable mixing meter. We also estimated the WD mixing fraction in some representative classical novae. Additionally, we found that a higher metallicity (i.e. higher WD mixing fraction) is preferentially accompanied by a longer t(2) (the time of decline by two magnitudes from peak luminosity) during nova outbursts. Our results can be used to constrain the mixing process in classical novae. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
资助项目 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11873085] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12003013] ; China Manned Space Project[CMS-CSST-2021-A13/B07] ; Western Light Youth Project of CAS ; Yunnan Fundamental Research Projects[2019FJ001] ; Yunnan Fundamental Research Projects[202001AS070029] |
WOS关键词 | WHITE-DWARFS ; PHOTOIONIZATION MODEL ; EVOLUTION ; ACCRETION ; CO ; METALLICITY ; SIMULATIONS ; STARS ; SHELL ; NUCLEOSYNTHESIS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | EDP SCIENCES S A |
WOS记录号 | WOS:000781443500007 |
资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11873085, 12003013] ; China Manned Space Project[CMS-CSST-2021-A13/B07] ; Western Light Youth Project of CAS ; Yunnan Fundamental Research Projects[2019FJ001, 202001AS070029] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25045] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Wu CY(吴程远) |
作者单位 | 1.University of Chinese Academy of Sciences, Beijing 100049, PR China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, PR China; |
推荐引用方式 GB/T 7714 | Guo YL,Wu CY,Wang B. Mixing fraction in classical novae[J]. ASTRONOMY & ASTROPHYSICS,2022,660. |
APA | Guo YL,Wu CY,&Wang B.(2022).Mixing fraction in classical novae.ASTRONOMY & ASTROPHYSICS,660. |
MLA | Guo YL,et al."Mixing fraction in classical novae".ASTRONOMY & ASTROPHYSICS 660(2022). |
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