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THE DENSE FILAMENTARY GIANT MOLECULAR CLOUD G23.0-0.4: BIRTHPLACE OF ONGOING MASSIVE STAR FORMATION
Su, Yang1,2; Zhang, Shaobo1,2; Shao, Xiangjun1,3; Yang, Ji1,2
2015-10-01
Source PublicationASTROPHYSICAL JOURNAL
Volume811Issue:2Pages:134-145
AbstractWe present observations of 1.5 square degree maps of the (CO)-C-12, (CO)-C-13, and (CO)-O-18 (J = 1 - 0) emission toward the complex region of the supernova remnant (SNR) W41 and SNR G22.7-0.2. A massive (similar to 5 x 10(5) M-circle dot), large (similar to 84 x 15 pc), and dense (similar to 10(3) cm(-3)) giant molecular cloud (GMC), G23.0-0.4 with V-LSR similar to 77 km s(-1), is found to be adjacent to the two SNRs. The GMC displays a filamentary structure approximately along the Galactic plane. The filamentary structure of the dense molecular gas, traced by (CO)-O-18 (J = 1 - 0) emission, is also coincident well with the distribution of the dust-continuum emission in the direction. Two dense massive MC clumps, two 6.7 GHz methanol masers, and one H II/SNR complex, associated with the 77 km s(-1) GMC G23.0-0.4, are aligned along the filamentary structure, indicating the star-forming activity within the GMC. These sources have periodic projected spacing of 0 degrees.18-0 degrees.26 along the giant filament, which is consistent with the theoretical predictions of 0 degrees.22. This indicates that the turbulence seems to dominate the fragmentation process of the dense gaseous filament on a large scale. The established 4.4 kpc distance of the GMC and the long dense filament traced by (CO)-O-18 emission, together with the rich massive star-formation groups in the nearby region, suggest that G23.0-0.4 is probably located at the near side of the Scutum-Centaurus arm in the first quadrant. Considering the large scale and the elongation structure along the Galactic plane, we speculate that the dense filamentary GMC is related to the spiral density wave of the Milky Way.
KeywordIsm: Clouds Ism: Individual Objects (Gmc G23.0-0.4) Ism: Molecules Stars: Formation
Subject Area射电天文学
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/811/2/134
WOS KeywordINFRARED-DARK CLOUD ; H-II REGIONS ; GALACTIC RING SURVEY ; COMPACT HII-REGIONS ; MILKY-WAY ; TRIGONOMETRIC PARALLAXES ; CLUSTER-FORMATION ; METHANOL MASERS ; ATLASGAL SURVEY ; SOURCE CATALOG
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000363513800062
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15323
Collection期刊(老文献)
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.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Su, Yang,Zhang, Shaobo,Shao, Xiangjun,et al. THE DENSE FILAMENTARY GIANT MOLECULAR CLOUD G23.0-0.4: BIRTHPLACE OF ONGOING MASSIVE STAR FORMATION[J]. ASTROPHYSICAL JOURNAL,2015,811(2):134-145.
APA Su, Yang,Zhang, Shaobo,Shao, Xiangjun,&Yang, Ji.(2015).THE DENSE FILAMENTARY GIANT MOLECULAR CLOUD G23.0-0.4: BIRTHPLACE OF ONGOING MASSIVE STAR FORMATION.ASTROPHYSICAL JOURNAL,811(2),134-145.
MLA Su, Yang,et al."THE DENSE FILAMENTARY GIANT MOLECULAR CLOUD G23.0-0.4: BIRTHPLACE OF ONGOING MASSIVE STAR FORMATION".ASTROPHYSICAL JOURNAL 811.2(2015):134-145.
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