Spectroscopy and kinematics of low-mass members of young moving groups
文献类型：期刊论文
| 作者 | Galvez-Ortiz, MC1; Clarke, JRA1; Pinfield, DJ1; Jenkins, JS2; Folkes, SL1; Perez, AEG3; Day-Jones, AC2; Burningham, B1; Jones, HRA1; Barnes, JR1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2010-12 |
| 卷号 | 409期号:2页码:552-566 |
| 关键词 | brown dwarfs stars: kinematics and dynamics stars: low-mass |
| ISSN号 | 0035-8711 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Galvez-Ortiz, MC (reprint author), Univ Hertfordshire, Ctr Astrophys Res, Sci & Technol Res Inst, Hatfield AL10 9AB, Herts, England. |
| 英文摘要 | We study a target sample of 68 low-mass objects (with spectral types in the range M4.5-L1) previously selected via photometric and astrometric criteria, as possible members of five young moving groups: the Local Association (Pleiades moving group, age = 20-150 Myr), the Ursa Mayor group (Sirius supercluster, age = 300 Myr), the Hyades supercluster (age = 600 Myr), IC 2391 supercluster (age = 35-55 Myr) and the Castor moving group (age = 200 Myr). In this paper, we assess their membership by using different kinematic and spectroscopic criteria. We use high-resolution echelle spectroscopic observations of the sample to measure accurate radial velocities. Distances are calculated and compared to those of the moving group from the literature, we also calculate the kinematic Galactic components (U, V, W) of the candidate members and apply kinematic criterion of membership to each group. In addition, we measure rotational velocities (v sin i) to place further constraints on membership of kinematic members. We find that 49 targets have young disc kinematics and that 36 of them possibly belong to one of our five moving groups. From the young disc target objects, 31 have rotational velocities in agreement with them belonging to the young disc population. We also find that one of our moving group candidates, 2MASS0123-3610, is a low-mass double lined spectroscopic binary, with probable spectral types around M7. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | URSA-MAJOR GROUP ; NEAR-INFRARED SPECTRA ; BROWN DWARF LP-944-20 ; MAIN-SEQUENCE STARS ; SOLAR-TYPE STARS ; L FIELD DWARFS ; ULTRACOOL DWARFS ; WIDE BINARIES ; ROTATIONAL VELOCITIES ; EVOLUTIONARY MODELS |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/409/2/552 |
| 语种 | 英语 |
| WOS记录号 | WOS:000284282300008 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4480]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.Centre for Astrophysics Research, Science and Technology Research Institute, University of Hertfordshire, Hatfield AL10 9AB 2.Department of Astronomy, Universidad de Chile, Casilla Postal 36D, Santiago, Chile 3.Department of Astronomy, University of Virginia, PO Box 400325, Charlottesville, VA 22904-4325, USA 4.Yunnan Observatory, PO Box 110, CAS, 650011 Kunming, China |
| 推荐引用方式 GB/T 7714 | Galvez-Ortiz, MC,Clarke, JRA,Pinfield, DJ,et al. Spectroscopy and kinematics of low-mass members of young moving groups[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,409(2):552-566. |
| APA | Galvez-Ortiz, MC.,Clarke, JRA.,Pinfield, DJ.,Jenkins, JS.,Folkes, SL.,...&R. S. Pokorny.(2010).Spectroscopy and kinematics of low-mass members of young moving groups.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,409(2),552-566. |
| MLA | Galvez-Ortiz, MC,et al."Spectroscopy and kinematics of low-mass members of young moving groups".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 409.2(2010):552-566. |
入库方式： OAI收割
来源：云南天文台
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