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Searching for further evidence for cloud-cloud collisions in L1188
Gong, Y.1,2,3; Tang, X. D.1,4; Henkel, C.1,4,5; Menten, K. M.1; Mao, R. Q.2,3; Wang, Y.6; Lee, M-Y7; Zhu, W. S.8; Lin, Y.1; Zhang, S. B.2,3; Chen, X. P.2,3; Yang, W. J.2,3
2019-12-12
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume632Pages:16
Corresponding AuthorGong, Y.(ygong@mpifr-bonn.mpg.de)
AbstractIn order to search for further observational evidence of cloud-cloud collisions in one of the promising candidates, L1188, we carried out observations of multiple molecular lines toward the intersection region of the two nearly orthogonal filamentary molecular clouds in L1188. Based on these observations, we find two parallel filamentary structures, both of which have at least two velocity components being connected with broad bridging features. We also found a spatially complementary distribution between the two molecular clouds, as well as enhanced (CO)-C-13 emission and (CO)-C-12 self-absorption toward their abutting regions. At the most blueshifted velocities, we unveil a 1 pc-long arc ubiquitously showing (CO)-C-12 line wings. We discover two 22 GHz water masers, which are the first maser detections in L1188. An analysis of line ratios at a linear resolution of 0.2 pc suggests that L1188 is characterised by kinetic temperatures of 13-23 K and H-2 number densities of 10(3)-10(3.6) cm(-3). On the basis of previous theoretical predictions and simulations, we suggest that these observational features can be naturally explained by the scenario of a cloud-cloud collision in L1188, although an additional contribution of stellar feedback from low-mass young stellar objects cannot be ruled out.
KeywordISM clouds ISM kinematics and dynamics radio lines ISM ISM molecules ISM individual objects L1188
DOI10.1051/0004-6361/201936824
WOS KeywordYOUNG STELLAR OBJECTS ; SPECTRAL ENERGY-DISTRIBUTIONS ; PERSISTENT COSMIC WEB ; WATER MASER SURVEY ; FILAMENTARY STRUCTURE ; ISOLATING SIGNATURES ; KELVIN-HELMHOLTZ ; SIO EMISSION ; NORTHERN SKY ; DENSE CORES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000502386900003
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35341
Collection中国科学院紫金山天文台
Corresponding AuthorGong, Y.
Affiliation1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
2.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210033, Jiangsu, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Jiangsu, Peoples R China
4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
5.King Abdulaziz Univ, Fac Sci, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia
6.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
7.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
8.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China
Recommended Citation
GB/T 7714
Gong, Y.,Tang, X. D.,Henkel, C.,et al. Searching for further evidence for cloud-cloud collisions in L1188[J]. ASTRONOMY & ASTROPHYSICS,2019,632:16.
APA Gong, Y..,Tang, X. D..,Henkel, C..,Menten, K. M..,Mao, R. Q..,...&Yang, W. J..(2019).Searching for further evidence for cloud-cloud collisions in L1188.ASTRONOMY & ASTROPHYSICS,632,16.
MLA Gong, Y.,et al."Searching for further evidence for cloud-cloud collisions in L1188".ASTRONOMY & ASTROPHYSICS 632(2019):16.
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