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Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart
Chen, Xi1,2; Shen, Zhi-Qiang1,2; Li, Xiao-Qiong1,3; Yang, Kai1,3; Li, Juan1,2; Wang, Jun-Zhi1,2; Wu, Ya-Jun1,2; Zhao, Rong-Bin1,2; Wang, Jin-Qing1,2; Dong, Jian1,2; Jiang, Dong-Rong1,2; Li, Bin1,2
2017-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume466Issue:4Pages:4364-4369
Corresponding AuthorChen, Xi(chenxi@shao.ac.cn) ; Shen, Zhi-Qiang(zshen@shao.ac.cn)
AbstractWe report the detections of H2CO emission at the 2 cm transition towards Galactic starforming regions with known 6 cm counterpart using the Shanghai Tianma Radio Telescope. One significant detection (in NGC 7538) and two possible detections (in G23.01-0.41 and G29.96-0.02) were made. Comparing with previous observations, we found that there is a time lag of appearance of 2 and 6 cm emissions detected in NGC 7538, contradicting with the prediction of radiative pumping via radio continuum radiation. Combinations of the variability of 6 cm masers in NGC 7538 suggest that collisional pumping via high-velocity shocks could better explain the 6 cm H2CO maser emission. Under this scheme, excitation of the 2 cm maser may require a higher collision energy compared to the 6 cm transition.
Keywordmasers stars: formation ISM: molecules radio lines: ISM
DOI10.1093/mnras/stx011
WOS KeywordVLA OBSERVATIONS ; STELLAR OBJECTS ; MASER ; H2CO ; NGC-7538 ; SEARCH
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000402849400043
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22992
Collection中国科学院紫金山天文台
Corresponding AuthorChen, Xi; Shen, Zhi-Qiang
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Chen, Xi,Shen, Zhi-Qiang,Li, Xiao-Qiong,et al. Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,466(4):4364-4369.
APA Chen, Xi.,Shen, Zhi-Qiang.,Li, Xiao-Qiong.,Yang, Kai.,Li, Juan.,...&Li, Bin.(2017).Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,466(4),4364-4369.
MLA Chen, Xi,et al."Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 466.4(2017):4364-4369.
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