XAO OpenIR  > 射电天文研究室  > 恒星形成与演化研究团组
Formaldehyde and H110 alpha observations towards 6.7 GHz methanol maser sources
Okoh, Daniel1,2,3; Esimbek, Jarken1; Zhou, Jian Jun1; Di Tang, Xin1; Chukwude, Augustine3; Urama, Johnson3; Okeke, Pius2
2014-04-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
Volume350Issue:2Pages:657-681
Contribution Rank1
AbstractIntriguing work on observations of 4.83 GHz formaldehyde (H2CO) absorptions and 4.87 GHz H110 alpha radio recombination lines (RRLs) towards 6.7 GHz methanol (CH3OH) maser sources is presented. Methanol masers provide ideal sites to probe the earliest stages of massive star formation, while 4.8 GHz formaldehyde absorptions are accurate probes of physical conditions in dense (10(3)-10(5) cm(-3)) and low temperature molecular clouds towards massive star forming regions. The work is aimed at studying feature similarities between the formaldehyde absorptions and the methanol masers so as to expand knowledge of events and physical conditions in massive star forming regions. A total of 176 methanol maser sources were observed for formaldehyde absorptions, and formaldehyde absorptions were detected 138 of them. 53 of the formaldehyde absorptions were newly detected. We noted a poor correlation between the methanol and formaldehyde intensities, an indication that the signals (though arise from about the same regions) are enhanced by different mechanisms. Our results show higher detection rates of the formaldehyde lines for sources with stronger methanol signals. The strongest formaldehyde absorptions were associated with IRAS sources and IRDCs that have developed HII regions, and that do not have EGOs.
KeywordMolecular Clouds-ism Molecule-stars Formation
SubtypeArticle
DOI10.1007/s10509-014-1779-0
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordH-II REGIONS ; RECOMBINATION LINE EMISSION ; LARGE ARRAY OBSERVATIONS ; DENSE MOLECULAR CLOUDS ; STAR-FORMING REGIONS ; DARK DUST CLOUDS ; INTERSTELLAR FORMALDEHYDE ; H2CO ABSORPTION ; GALACTIC-CENTER ; 6-CENTIMETER H2CO
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000332664500028
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/621
Collection射电天文研究室_恒星形成与演化研究团组
射电天文研究室
其它
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Univ Nigeria, Ctr Basic Space Sci, Nsukka 410001, Nigeria
3.Univ Nigeria, Dept Phys & Astron, Nsukka 410001, Nigeria
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Okoh, Daniel,Esimbek, Jarken,Zhou, Jian Jun,et al. Formaldehyde and H110 alpha observations towards 6.7 GHz methanol maser sources[J]. ASTROPHYSICS AND SPACE SCIENCE,2014,350(2):657-681.
APA Okoh, Daniel.,Esimbek, Jarken.,Zhou, Jian Jun.,Di Tang, Xin.,Chukwude, Augustine.,...&Okeke, Pius.(2014).Formaldehyde and H110 alpha observations towards 6.7 GHz methanol maser sources.ASTROPHYSICS AND SPACE SCIENCE,350(2),657-681.
MLA Okoh, Daniel,et al."Formaldehyde and H110 alpha observations towards 6.7 GHz methanol maser sources".ASTROPHYSICS AND SPACE SCIENCE 350.2(2014):657-681.
Files in This Item:
File Name/Size DocType Version Access License
Formaldehyde and H11(2213KB)期刊论文出版稿开放获取CC BY-NC-NDView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Okoh, Daniel]'s Articles
[Esimbek, Jarken]'s Articles
[Zhou, Jian Jun]'s Articles
Baidu academic
Similar articles in Baidu academic
[Okoh, Daniel]'s Articles
[Esimbek, Jarken]'s Articles
[Zhou, Jian Jun]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Okoh, Daniel]'s Articles
[Esimbek, Jarken]'s Articles
[Zhou, Jian Jun]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Formaldehyde and H110 alpha observations towar.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.