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The effects of ionization feedback on star formation: a case study of the M 16 H II region
Xu, Jin-Long1,6; Zavagno, Annie2; Yu, Naiping1; Liu, Xiao-Lan1; Xu, Ye3,7; Yuan, Jinghua1; Zhang, Chuan-Peng1; Zhang, Si-Ju2; Zhang, Guo-Yin1; Ning, Chang-Chun4; Ju, Bing-Gang5,7
2019-06-27
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN1432-0746
Volume627Pages:17
Corresponding AuthorXu, Jin-Long(xuj1@bao.ac.cn)
AbstractAims. We aim to investigate the impact of the ionized radiation from the M 16 HII region on the surrounding molecular cloud and on its hosted star formation. Methods. To present comprehensive multi-wavelength observations towards the M 16 HII region, we used new CO data and existing infrared, optical, and submillimeter data. The (CO)-C-12 J = 1-0, (CO)-C-13 J = 1-0, and (CO)-O-18 J = 1-0 data were obtained with the Purple Mountain Observatory (PMO) 13.7 m radio telescope. To trace massive clumps and extract young stellar objects (YSOs) associated with the M 16 HII region, we used the ATLASGAL and GLIMPSE I catalogs, respectively. Results. From CO data, we discern a large-scale filament with three velocity components. Because these three components overlap with each other in both velocity and space, the filament may be made of three layers. The M 16 ionized gas interacts with the large-scale filament and has reshaped its structure. In the large-scale filament, we find 51 compact cores from the ATLASGAL catalog, 20 of them being quiescent. The mean excitation temperature of these cores is 22.5 K, while this is 22.2K for the quiescent cores. This high temperature observed for the quiescent cores suggests that the cores may be heated by M 16 and do not experience internal heating from sources in the cores. Through the relationship between the mass and radius of these cores, we obtain that 45% of all the cores are massive enough to potentially form massive stars. Compared with the thermal motion, the turbulence created by the nonthermal motion is responsible for the core formation. For the pillars observed towards M 16, the H II region may give rise to the strong turbulence.
KeywordHII regions ISM: clouds stars: formation
DOI10.1051/0004-6361/201935024
WOS KeywordINFRARED DARK CLOUDS ; MASSIVE STARS ; PHYSICAL-PROPERTIES ; CLUSTERS ; DENSITY ; FRAGMENTATION ; DISSIPATION ; TURBULENT ; RADIATION ; BALANCE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000473253700001
PublisherEDP SCIENCES S A
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27358
Collection中国科学院紫金山天文台
Corresponding AuthorXu, Jin-Long
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
2.Aix Marseille Univ, LAM, CNRS, Marseille, France
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
4.Tibet Univ, Lhasa 850000, Tibet, Peoples R China
5.Purple Mt Observ, Qinghai Stn, Delingha 817000, Peoples R China
6.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100101, Peoples R China
7.Chinese Acad Sci, Key Lab Radio Astron, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Xu, Jin-Long,Zavagno, Annie,Yu, Naiping,et al. The effects of ionization feedback on star formation: a case study of the M 16 H II region[J]. ASTRONOMY & ASTROPHYSICS,2019,627:17.
APA Xu, Jin-Long.,Zavagno, Annie.,Yu, Naiping.,Liu, Xiao-Lan.,Xu, Ye.,...&Ju, Bing-Gang.(2019).The effects of ionization feedback on star formation: a case study of the M 16 H II region.ASTRONOMY & ASTROPHYSICS,627,17.
MLA Xu, Jin-Long,et al."The effects of ionization feedback on star formation: a case study of the M 16 H II region".ASTRONOMY & ASTROPHYSICS 627(2019):17.
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