PMO OpenIR  > 分子云与恒星形成研究团组
YOUNG STELLAR OBJECTS IN LYNDS 1641: DISKS, ACCRETION, AND STAR FORMATION HISTORY
Fang, Min1,2,3,4; Kim, Jinyoung Serena5; van Boekel, Roy3; Sicilia-Aguilar, Aurora6; Henning, Thomas3; Flaherty, Kevin5
2013-07-01
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN0067-0049
Volume207Issue:1Pages:0
Corresponding AuthorFang, M (reprint author), Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Peoples R China. Email: mfang@pmo.ac.cn
AbstractWe 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.
KeywordAccretion, Accretion Disks Protoplanetary Disks Stars: Pre-main Sequence
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0067-0049/207/1/5
WOS KeywordT-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
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000322631500005
Citation statistics
Cited Times:59[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9839
Collection分子云与恒星形成研究团组
Affiliation1.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
Recommended Citation
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.
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