YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
The Evolution of Massive Close Binaries: Anomalous Relationship between Nitrogen Abundances and Rotational Velocities
Song, Hanfeng1,2,3; Wang, Jiangtao4; Song, Fen3,5; Zhang, Ruiyu6; Li, Zhi1; Peng, Weiguo1; Zhan, Qiong1; Jing, Jianghong1
Source PublicationASTROPHYSICAL JOURNAL
2018-05-20
Volume859Issue:1
DOI10.3847/1538-4357/aabfda
Indexed BySCI
KeywordBinaries: Close Stars: Abundances Stars: Evolution Stars: Massive Stars: Rotation
Abstract

The combined effects of rotation and mass accretion on the evolution of binary systems are investigated in this work. Rotational binaries provide us with a promising channel that could explain the abnormal phenomenon of the nitrogen abundances in Groups 1 and 2 of the Galactic Hunter diagram. Group 1 contains fast-rotating but nitrogen-unenriched stars, whereas Group 2 includes apparently slowly rotating but nitrogen-enhanced stars. The donor star suffers from heavy mass loss that progressively exposes deep layers of nitrogen and corresponding angular momentum loss that can efficiently spin the star down. Rapid-rotation stars without nitrogen enrichment may be related to mass gainers that had accreted little matter from a close companion and then been spun up to rapid rotation. Nitrogen enrichment of mass gainers can be greatly suppressed by low accreting efficiency, which is induced by critical rotation, thermohaline mixing, and the gradient of mean molecular weight. Nitrogen enrichment due to mass accretion appears to be more efficient than that due to rotational mixing, because there exist thermohaline instabilities during Roche lobe overflow. The mixing in the enlarged convective core reduces carbon and nitrogen abundances but increases oxygen abundances in mass gainers. This process significantly triggers CNO cycling but does not support CN cycling. The orbital separation can be widened because of the nonconservative mass transfer, and this process gives rise to weak tidal torques. Therefore, invoking binaries has the potential to simultaneously explain the observed stars in Groups 1 and 2 of the Galactic Hunter diagram.

Funding ProjectNational Natural Science Foundation of China[11463002] ; National Natural Science Foundation of China[11373020] ; National Natural Science Foundation of China[11603009] ; Natural Science Foundation of Fujian Province[2016J05013] ; Natural Science Foundation of Fujian Province[2018J05006] ; Open Foundation of the Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Science[OP201405] ; Open Foundation of the Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Science[OP201404(B615015)] ; Science Foundation of Jimei University[C613030]
Funding OrganizationNational Natural Science Foundation of China[11463002, 11373020, 11603009] ; Natural Science Foundation of Fujian Province[2016J05013, 2018J05006] ; Open Foundation of the Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Science[OP201405, OP201404(B615015)] ; Science Foundation of Jimei University[C613030]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000432981500003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGAMMA-RAY BURSTS ; PRESUPERNOVA EVOLUTION ; THERMOHALINE CONVECTION ; STELLAR EVOLUTION ; STAR PROGENITORS ; MERGER RATES ; CIRCULATION ; TURBULENCE ; TRANSPORT ; MODELS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12389
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorSong, Hanfeng
Affiliation1.College of Physics, Guizhou University, Guiyang, Guizhou Province, 550025, People's Republic of China
2.Geneva Observatory, Geneva University, CH-1290 Sauverny, Switzerland
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
4.Department of Astronomy, Beijing Normal University, 100875, Beijing, People's Republic of China
5.College of Science, Jimei University, Xiamen City, 361021 Fujian Province, People's Republic of China
6.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai City, 200030, People's Republic of China
Recommended Citation
GB/T 7714
Song, Hanfeng,Wang, Jiangtao,Song, Fen,et al. The Evolution of Massive Close Binaries: Anomalous Relationship between Nitrogen Abundances and Rotational Velocities[J]. ASTROPHYSICAL JOURNAL,2018,859(1).
APA Song, Hanfeng.,Wang, Jiangtao.,Song, Fen.,Zhang, Ruiyu.,Li, Zhi.,...&Jing, Jianghong.(2018).The Evolution of Massive Close Binaries: Anomalous Relationship between Nitrogen Abundances and Rotational Velocities.ASTROPHYSICAL JOURNAL,859(1).
MLA Song, Hanfeng,et al."The Evolution of Massive Close Binaries: Anomalous Relationship between Nitrogen Abundances and Rotational Velocities".ASTROPHYSICAL JOURNAL 859.1(2018).
Files in This Item:
File Name/Size DocType Version Access License
The Evolution of Mas(1220KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Song, Hanfeng]'s Articles
[Wang, Jiangtao]'s Articles
[Song, Fen]'s Articles
Baidu academic
Similar articles in Baidu academic
[Song, Hanfeng]'s Articles
[Wang, Jiangtao]'s Articles
[Song, Fen]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Song, Hanfeng]'s Articles
[Wang, Jiangtao]'s Articles
[Song, Fen]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: The Evolution of Massive Close Binaries_ Anomalous Relationship between Nitrogen Abundances and Rotational Velocities.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.