中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 暗物质和空间天文实验室  > 期刊论文
题名: Evidence for very nearby hidden white dwarfs
作者: Fuhrmann, K.1, 2; Chini, R.1, 3; Kaderhandt, L.1; Chen, Z.1, 4, 5; Lachaume, R.6, 7
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2016-06-21
卷号: 459, 期号:2, 页码:1682-1686
关键词: binaries: spectroscopic ; binaries: visual ; blue stragglers ; stars: individual: (alpha For, xi UMa) ; stars: solar-type ; white dwarfs
DOI: 10.1093/mnras/stw760
文章类型: Article
英文摘要: We report the discovery of a tertiary component to the prominent and nearby (d = 14 pc) visual binary alpha Fornacis. The new invisible component is part of a 4-d short-period Ba-Bb subsystem, whose K-type alpha For Ba primary shows a striking [Ba/Fe] = +0.26 dex overabundance, at variance with a close to solar [Ba/Fe] = +0.04 dex abundance for its distant visual companion alpha For A. For the even nearer (d = 8 pc) multiple star xi Ursae Majoris and its alike 4-d Ba-Bb subsystem, we similarly find [Ba/Fe] = +0.37 dex for its G-type xi UMa Ba primary, compared to a significantly lower [Ba/Fe] = +0.12 dex for the visual companion xi UMa A. In both cases, the differential barium enrichment is direct evidence for short-period white dwarf systems and the creation of blue straggler stars through mass transfer and wind accretion, for their close and distant companions, respectively. These findings also imply that conventional stellar age datings for both alpha For and xi UMa are likely not reliable.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: FIELD BLUE STRAGGLERS ; PROPER-MOTION STARS ; SPECTROSCOPIC BINARIES ; SUN KINEMATICS ; BARIUM ; MULTIPLICITY ; EVOLUTION ; ROTATION ; REGULUS ; SYSTEMS
收录类别: SCI
项目资助者: ESO programmes(092.A-9002(A) ; Nordrhein-Westfalische Akademie der Wissenschaften und der Kunste in the framework of the academy programme by the Federal Republic of Germany ; state Nordrhein-Westfalen ; DFG(FU 198/10-1) ; Comite mixto ESO-Chile ; 096.A-9009(A))
语种: 英语
WOS记录号: WOS:000377471200041
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16237
Appears in Collections:暗物质和空间天文实验室_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
2016126.pdf(494KB)----限制开放View 联系获取全文

作者单位: 1.Ruhr Univ Bochum, Astron Inst, Univ Str 150, D-44801 Bochum, Germany
2.Isaac Newton Grp Telescopes, Apartado 321, E-38700 Santa Cruz De La Palma, Spain
3.Univ Catolica Norte, Inst Astron, Ave Angamos 0610,Casilla 1280, Antofagasta, Chile
4.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
5.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
6.Pontificia Univ Catolica Chile, Inst Astrofis, Fac Fis, Ctr Astroingn, Casilla 306, Santiago 8970117 22, Chile
7.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Fuhrmann, K.]'s Articles
[Chini, R.]'s Articles
[Kaderhandt, L.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Fuhrmann, K.]‘s Articles
[Chini, R.]‘s Articles
[Kaderhandt, L.]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: 2016126.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace