YNAO OpenIR  > 大样本恒星演化研究组
The formation of EL CVn-type binaries
Chen XF(陈雪飞)1,2,3; Maxted, P. F. L.4; Li J(李蛟)1,2,5; Han ZW(韩占文)1,2,3; Chen, Xuefei(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China)
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017-05-01
卷号467期号:2页码:1874-1889
DOI10.1093/mnras/stx115
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual: El Cvn
摘要EL CVn-type binaries are eclipsing binaries that contain an A-or F-type dwarf star and a very low mass (similar to 0.2 M-circle dot) helium white dwarf precursor (proto-He WD). A number of such objects have been discovered in the Wide Angle Search for Planets and Kepler photometric surveys. Here, we have studied the formation of EL CVn-type binaries and give the properties and the space density of this population of stars in the Galaxy. We show that EL CVn binaries cannot be produced by common envelope evolution as previously believed because this process leads to merging of the components when giants have such low-mass cores. Stable mass transfer in low-mass binaries, from more than 65 000 runs of Population I binary evolution, may well reproduce the properties of EL CVn stars such as the evolutionary phase, mass ratios and the WD mass-period (M-WD-P) relation. The study shows that the most common donor mass range for producing the observed EL CVn-type stars is 1.15-1.20 M-circle dot and that the lifetime of such objects increases dramatically with decreasing proto-He WD mass. This leads to an intrinsic peak mass around the minimum mass of proto-He WDs of similar to 0.16 M-circle dot. The most probable proto-He WD mass is 0.17-0.21 M-circle dot after selection effects included. We estimated the number of EL CVn stars with P <= 2.2 d to be 2-5 x 10(6) in the Galaxy, indicating a local density of 4-10 x 10(-6) pc-(3). We conclude that many more EL CVn-type binaries remain to be discovered and that these binaries will be predominantly low-mass systems in old stellar populations.
项目资助者Natural Science Foundation of China(11422324, 11521303, 11390374) ; Yunnan province(2012HB037, 2013HA005) ; Chinese Academy of Sciences(KJZD-EW-M06-01)
语种英语
学科领域天文学
文章类型Article
ISSN0035-8711
URL查看原文
WOS记录号WOS:000398416700046
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STELLAR ASTROPHYSICS MESA ; WHITE-DWARF COMPANIONS ; RED-GIANT STAR ; LOW-MASS ; BLUE STRAGGLERS ; ORBITAL-PERIOD ; EVOLUTION ; SYSTEMS ; KEPLER ; PULSATIONS
引用统计
被引频次:9[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/114a53/10014
专题大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
通讯作者Chen, Xuefei(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China)
作者单位1.1Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
4.Astrophysics Group, Keele University, Keele, Staffordshire ST5 5BG, UK
5.University of the Chinese Academy of Sciences, Yuquan Road 19, Shijingshan Block, 100049 Beijing, China
推荐引用方式
GB/T 7714
Chen XF,Maxted, P. F. L.,Li J,et al. The formation of EL CVn-type binaries[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,467(2):1874-1889.
APA Chen XF,Maxted, P. F. L.,Li J,Han ZW,&Chen, Xuefei.(2017).The formation of EL CVn-type binaries.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,467(2),1874-1889.
MLA Chen XF,et al."The formation of EL CVn-type binaries".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467.2(2017):1874-1889.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
The formation of EL (2904KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Chen XF(陈雪飞)]的文章
[Maxted, P. F. L.]的文章
[Li J(李蛟)]的文章
百度学术
百度学术中相似的文章
[Chen XF(陈雪飞)]的文章
[Maxted, P. F. L.]的文章
[Li J(李蛟)]的文章
必应学术
必应学术中相似的文章
[Chen XF(陈雪飞)]的文章
[Maxted, P. F. L.]的文章
[Li J(李蛟)]的文章
相关权益政策
暂无数据
收藏/分享
文件名: The formation of EL CVn-type binaries.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。