YOUNG STELLAR OBJECTS IN LYNDS 1641: DISKS, ACCRETION, AND STAR FORMATION HISTORY
文献类型：期刊论文
| 作者 | Fang, Min1,2,3,4 ; Kim, Jinyoung Serena5; van Boekel, Roy3; Sicilia-Aguilar, Aurora6; Henning, Thomas3; Flaherty, Kevin5
|
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2013-07-01 |
| 卷号 | 207期号:1页码:0 |
| ISSN号 | 0067-0049 |
| 关键词 | accretion, accretion disks protoplanetary disks stars: pre-main sequence |
| 通讯作者 | Fang, M (reprint author), Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Peoples R China. Email: mfang@pmo.ac.cn |
| 英文摘要 | We investigate the young stellar objects (YSOs) in the Lynds 1641 (L1641) cloud using multi-wavelength data including Spitzer, WISE, the Two Micron All Sky Survey, and XMM covering similar to 1390 YSOs across a range of evolutionary stages. In addition, we targeted a sub-sample of YSOs for optical spectroscopy with the MMT/Hectospec and the MMT/Hectochelle. We use these data, along with archival photometric data, to derive spectral types, extinction values, masses, ages, and accretion rates. We obtain a disk fraction of similar to 50% in L1641. The disk frequency is almost constant as a function of stellar mass with a slight peak at log(M-*/M-circle dot) approximate to -0.25. The analysis of multi-epoch spectroscopic data indicates that the accretion variability of YSOs cannot explain the two orders of magnitude of scatter for YSOs with similar masses. Forty-six new transition disk (TD) objects are confirmed in this work, and we find that the fraction of accreting TDs is lower than for optically thick disks (40%-45% versus 77%-79%, respectively). We confirm our previous result that the accreting TDs have a median accretion rate similar to normal optically thick disks. We confirm that two star formation modes (isolated versus clustered) exist in L1641. We find that the diskless YSOs are statistically older than the YSOs with optically thick disks and the TD objects have a median age that is intermediate between those of the other two populations. We tentatively study the star formation history in L1641 based on the age distribution and find that star formation started to be active 2-3 Myr ago. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | T-TAURI STARS ; ORION NEBULA CLUSTER ; MAIN-SEQUENCE STARS ; LOW-MASS STARS ; SPITZER-SPACE-TELESCOPE ; INFRARED LUMINOSITY FUNCTIONS ; NEWTON SERENDIPITOUS SURVEY ; ETA-CHAMAELEONTIS CLUSTER ; HERBIG AE/BE STARS ; SOLAR-TYPE STARS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000322631500005 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9839]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 3.Max Planck Inst Astron, D-69117 Heidelberg, Germany 4.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 5.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 6.Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, Madrid 28049, Spain |
| 推荐引用方式 GB/T 7714 | Fang, Min,Kim, Jinyoung Serena,van Boekel, Roy,et al. YOUNG STELLAR OBJECTS IN LYNDS 1641: DISKS, ACCRETION, AND STAR FORMATION HISTORY[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2013,207(1):0. |
| APA | Fang, Min,Kim, Jinyoung Serena,van Boekel, Roy,Sicilia-Aguilar, Aurora,Henning, Thomas,&Flaherty, Kevin.(2013).YOUNG STELLAR OBJECTS IN LYNDS 1641: DISKS, ACCRETION, AND STAR FORMATION HISTORY.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,207(1),0. |
| MLA | Fang, Min,et al."YOUNG STELLAR OBJECTS IN LYNDS 1641: DISKS, ACCRETION, AND STAR FORMATION HISTORY".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 207.1(2013):0. |
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。