PMO OpenIR
Catalog of High Protostellar Surface Density Regions in Nearby Embedded Clusters
Li, Juan1,2; Myers, Philip C.3; Kirk, Helen4,5; Gutermuth, Robert A.6; Dunham, Michael M.3,7; Pokhrel, Riwaj3,6
2019-02-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume871Issue:2Pages:18
Corresponding AuthorLi, Juan(lijuan@shao.ac.cn)
AbstractWe analyze high-quality stellar catalogs for 24 young and nearby (within 1 kpc) embedded clusters and present a catalog of 32 groups which have a high concentration of protostars. The median effective radius of these groups is 0.17 pc. The median protostellar and pre-main-sequence star surface densities are 46 M-circle dot pc(-2) and 11 M-circle dot pc(-2), respectively. We estimate the age of these groups using a model of constant birthrate and random accretion stopping and find a median value of 0.25 Myr. Some groups in Aquila, Serpens, Corona Australia, and Ophichus L1688 show high protostellar surface density and high molecular gas surface density, and seem to be undergoing vigorous star formation. These groups provide an excellent opportunity to study the initial conditions of clustered star formation. Comparisons of protostellar and pre-main-sequence stellar surface densities reveal continuous low-mass star formation of these groups over several Myr in some clouds. For groups with typical protostellar separations of less than 0.4 pc, we find that these separations agree well with the thermal Jeans fragmentation scale. On the other hand, for groups with typical protostellar separations larger than 0.4 pc, these separations are always larger than the associated Jeans length.
Keywordinfrared: stars stars: formation stars: low-mass stars: pre-main sequence stars: protostars
DOI10.3847/1538-4357/aaf652
WOS KeywordYOUNG STELLAR CLUSTERS ; STAR-FORMATION RATES ; MOLECULAR CLOUD ; SPITZER SURVEY ; FRAGMENTATION ; GAS ; ORION ; EVOLUTION ; COLLAPSE ; CORES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000457181200017
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/18783
Collection中国科学院紫金山天文台
Corresponding AuthorLi, Juan
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
3.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
4.Univ Victoria, Dept Phys & Astron, 3800 Finnerty Rd, Victoria, BC V8P 5C2, Canada
5.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada
6.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA
7.SUNY Coll Fredonia, Dept Phys, 280 Cent Ave, Fredonia, NY 14063 USA
Recommended Citation
GB/T 7714
Li, Juan,Myers, Philip C.,Kirk, Helen,et al. Catalog of High Protostellar Surface Density Regions in Nearby Embedded Clusters[J]. ASTROPHYSICAL JOURNAL,2019,871(2):18.
APA Li, Juan,Myers, Philip C.,Kirk, Helen,Gutermuth, Robert A.,Dunham, Michael M.,&Pokhrel, Riwaj.(2019).Catalog of High Protostellar Surface Density Regions in Nearby Embedded Clusters.ASTROPHYSICAL JOURNAL,871(2),18.
MLA Li, Juan,et al."Catalog of High Protostellar Surface Density Regions in Nearby Embedded Clusters".ASTROPHYSICAL JOURNAL 871.2(2019):18.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Juan]'s Articles
[Myers, Philip C.]'s Articles
[Kirk, Helen]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Juan]'s Articles
[Myers, Philip C.]'s Articles
[Kirk, Helen]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Juan]'s Articles
[Myers, Philip C.]'s Articles
[Kirk, Helen]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

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