PMO OpenIR  > 分子云与恒星形成研究团组
COEVAL INTERMEDIATE-MASS STAR FORMATION IN N4W
Chen, Zhiwei1,2; Zhang, Shaobo1,2; Zhang, Miaomiao1,2; Jiang, Zhibo1,2; Tamura, Motohide3,4; Kwon, Jungmi3,4
2016-05-10
Source PublicationASTROPHYSICAL JOURNAL
Volume822Issue:2
AbstractProtostars are mostly found in star-forming regions, where the natal molecular gas still remains. At about 5' west of the molecular bubble N4, N4W is identified as a star-forming clump hosting three Class II (IRS 1-3), and one Class I (IRS 4) young stellar objects (YSOs), as well as a submillimeter source SMM1. The near-IR polarization imaging data of N4W reveal two infrared reflection nebulae close to each other, which are in favor of the outflows of IRS 1 and IRS 2. The bipolar mid-IR emission centered on IRS 4 and the arc-like molecular gas shell are lying on the same axis, indicating a bipolar molecular outflow from IRS 4. There are two dust temperature distributions in N4W. The warmer one is widely distributed and has a temperature of T-d greater than or similar to 28 K, with the colder one being from the embedded compact submillimeter source SMM1. N4W's mass is estimated to be similar to 2.5 x 10(3) M-circle dot, and the mass of SMM1 is similar to 5.5 x 10(2) M-circle dot at T-d = 15 K, calculated from the CO 1 - 0 emission and 870 mu m dust continuum emission, respectively. Based on the estimates of the bolometric luminosity of IRS 1-4, these four sources are intermediate-mass YSOs at least. SMM1 is gravitationally bound, and is capable of forming intermediate-mass stars or even possibly massive stars. The co-existence of the IR bright YSOs and the submillimeter source represents potential sequential star formation processes separated by similar to 0.5 Myr in N4W. This small age spread implies that the intermediate-mass star formation processes happening in N4W are almost coeval.
KeywordInfrared: Stars Ism: Jets And Outflows Stars: Formation Submillimeter: Stars
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/822/2/114
WOS KeywordYOUNG STELLAR OBJECTS ; GALACTIC PLANE ; FORMING REGION ; SOURCE CATALOG ; MILKY-WAY ; MU-M ; SPITZER ; ATLASGAL ; CLUSTER ; POLARIZATION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000377204900057
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16233
Collection分子云与恒星形成研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Tokyo, Dept Astron, Grad Sch Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
4.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
Recommended Citation
GB/T 7714
Chen, Zhiwei,Zhang, Shaobo,Zhang, Miaomiao,et al. COEVAL INTERMEDIATE-MASS STAR FORMATION IN N4W[J]. ASTROPHYSICAL JOURNAL,2016,822(2).
APA Chen, Zhiwei,Zhang, Shaobo,Zhang, Miaomiao,Jiang, Zhibo,Tamura, Motohide,&Kwon, Jungmi.(2016).COEVAL INTERMEDIATE-MASS STAR FORMATION IN N4W.ASTROPHYSICAL JOURNAL,822(2).
MLA Chen, Zhiwei,et al."COEVAL INTERMEDIATE-MASS STAR FORMATION IN N4W".ASTROPHYSICAL JOURNAL 822.2(2016).
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