Evidence for very nearby hidden white dwarfs
文献类型：期刊论文
| 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 |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000377471200041 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/16237]  |
| 专题 | 紫金山天文台_暗物质和空间天文实验室 |
| 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 |
| 推荐引用方式 GB/T 7714 | Fuhrmann, K.,Chini, R.,Kaderhandt, L.,et al. Evidence for very nearby hidden white dwarfs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,459(2):1682-1686. |
| APA | Fuhrmann, K.,Chini, R.,Kaderhandt, L.,Chen, Z.,&Lachaume, R..(2016).Evidence for very nearby hidden white dwarfs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,459(2),1682-1686. |
| MLA | Fuhrmann, K.,et al."Evidence for very nearby hidden white dwarfs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.2(2016):1682-1686. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
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。