The C/O ratio of He-accreting carbon-oxygen white dwarfs and type Ia supernovae | |
Cui X(崔晓)3; Wang B(王博); Wu CY(吴程远); Meng XC(孟祥存); Han ZW(韩占文) | |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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2020-01 | |
卷号 | 20期号:1页码:8 |
关键词 | stars evolution supernovae general white dwarfs |
ISSN号 | 1674-4527 |
DOI | 10.1088/1674-4527/20/1/3 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Type Ia supernovae (SNe Ia) are thermonuclear explosions of carbon-oxygen white dwarfs (CO WDs), and are believed to be excellent cosmological distance indicators due to their high luminosity and remarkable uniformity. However, there exists a diversity among SNe Ia, and a poor understanding of the diversity hampers the improvement of the accuracy of cosmological distance measurements. The variations of the ratios of carbon to oxygen (C/O) of WDs at explosion are suggested to contribute to the diversity. In the canonical model of SNe Ia, a CO WD accretes matter from its companion and increases its mass till the Chandrasekhar mass limit when the WD explodes. In this work, we studied the C/O ratio for accreting CO WDs. Employing the stellar evolution code MESA, we simulated the accretion of He-rich material onto CO WDs with different initial WD masses and different mass accretion rates. We found that the C/O ratio varies for different cases. The C/O ratio of He-accreting CO WDs at explosion increases with a decreasing initial WD mass or a decreasing accretion rate. The various C/O ratios may, therefore, contribute to the diversity of SNe Ia. |
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 | 20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA 期刊信息 |
资助项目 | National Natural Science Foundation of China[11521303] ; National Natural Science Foundation of China[11873085] ; National Natural Science Foundation of China[11673059] ; National Natural Science Foundation of China[11733008] ; Chinese Academy of Sciences[QYZDB-SSW-SYS001] ; Natural Science Foundation of Yunnan Province[2015HB096] ; Natural Science Foundation of Yunnan Province[2018FB005] |
WOS关键词 | SINGLE-DEGENERATE CHANNEL ; EVOLUTION ; PROGENITORS ; MODEL ; BINARIES ; EFFICIENCY ; DIVERSITY ; PRODUCTS ; NOVAE ; STARS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
WOS记录号 | WOS:000509298400001 |
资助机构 | National Natural Science Foundation of China[11521303, 11873085, 11673059, 11733008] ; Chinese Academy of Sciences[QYZDB-SSW-SYS001] ; Natural Science Foundation of Yunnan Province[2015HB096, 2018FB005] |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/22114] ![]() |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Cui X(崔晓) |
作者单位 | 1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China 2.University of the Chinese Academy of Sciences, Beijing 100049, China 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China |
推荐引用方式 GB/T 7714 | Cui X,Wang B,Wu CY,et al. The C/O ratio of He-accreting carbon-oxygen white dwarfs and type Ia supernovae[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(1):8. |
APA | Cui X,Wang B,Wu CY,Meng XC,&Han ZW.(2020).The C/O ratio of He-accreting carbon-oxygen white dwarfs and type Ia supernovae.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(1),8. |
MLA | Cui X,et al."The C/O ratio of He-accreting carbon-oxygen white dwarfs and type Ia supernovae".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.1(2020):8. |
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