PMO OpenIR
The Relationship between 6.7 GHz Methanol Masers and Radio Recombination Lines in High-mass Star-forming Regions
Ouyang, Xu-Jia1; Chen, Xi1,2; Shen, Zhi-Qiang2,3; Yang, Kai2,4; Li, Xiao-Qiong2,4; Chen, Hon-Yin2,4; Zhao, Zhang1; Sobolev, Andrej M.5
2019-11-01
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN0067-0049
Volume245Issue:1Pages:17
Corresponding AuthorChen, Xi(chenxi@gzhu.edu.cn)
AbstractWe report a systematic survey of a 6.7 GHz Class II methanol maser toward a sample of 448 sources selected from the Red Midcourse Space Experiment Source catalog. These sample sources are composed of high-mass star-forming region (HMSFR) candidates and have been studied as tracers of HMSFRs, such as water masers or radio continuum emission of ultracompact H ii region. The survey was conducted using the Shanghai Tianma Radio Telescope. Through the observations, we simultaneously studied the 4.7 and 6.0 GHz excited-state interstellar hydroxyl (OH) maser lines and 10 hydrogen radio recombination lines (RRLs) in the C band. In total, we detected 6.7 GHz methanol masers and RRLs from 102 and 116 sources, respectively. In addition, 4, 3, and 10 sources exhibit OH masers at 4765.56, 6030.75, and 6035.09 MHz transitions, respectively. Through the survey, we identified four new 6.7 GHz methanol maser sources and three new excited-state OH maser sources (one at 4750 MHz and two at 6035 MHz). The statistical analysis demonstrated that there is a positive correlation of luminosity between 6.7 GHz methanol masers and RRLs. A good correlation of integrated luminosity between radio continuum emission and the 6.7 GHz methanol masers is presented with respect to the RRL emission sources. The average of the integrated luminosities of the RRLs in the sources with 6.7 GHz masers is greater than those without the 6.7 GHz masers; similarly, the average of integrated luminosities of the 6.7 GHz methanol masers in the sources with RRLs is greater than those without the RRLs. Moreover, we found that the averages of the emission measure and electron temperature of H ii regions associated with 6.7 GHz methanol masers are larger than those without the 6.7 GHz methanol masers. This suggests that the masers are most likely produced in high gas density and luminous regions with brighter RRLs and higher radio continuum emission.
KeywordAstrophysical masers Interstellar medium H II regions Surveys Star formation Interstellar molecules
DOI10.3847/1538-4365/ab4db2
WOS KeywordINTERSTELLAR HYDROXYL MASERS ; COMPACT HII-REGIONS ; PLANE SURVEY HOPS ; H II REGIONS ; GALACTIC PLANE ; TRIGONOMETRIC PARALLAXES ; H2O MASERS ; CATALOG ; OH ; SEARCH
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000499826200001
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35181
Collection中国科学院紫金山天文台
Corresponding AuthorChen, Xi
Affiliation1.Guangzhou Univ, Ctr Asrophys, Guangzhou 510006, Guangdong, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Beijing, Peoples R China
4.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China
5.Ural Fed Univ, 19 Mira St, Ekaterinburg 620002, Russia
Recommended Citation
GB/T 7714
Ouyang, Xu-Jia,Chen, Xi,Shen, Zhi-Qiang,et al. The Relationship between 6.7 GHz Methanol Masers and Radio Recombination Lines in High-mass Star-forming Regions[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2019,245(1):17.
APA Ouyang, Xu-Jia.,Chen, Xi.,Shen, Zhi-Qiang.,Yang, Kai.,Li, Xiao-Qiong.,...&Sobolev, Andrej M..(2019).The Relationship between 6.7 GHz Methanol Masers and Radio Recombination Lines in High-mass Star-forming Regions.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,245(1),17.
MLA Ouyang, Xu-Jia,et al."The Relationship between 6.7 GHz Methanol Masers and Radio Recombination Lines in High-mass Star-forming Regions".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 245.1(2019):17.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ouyang, Xu-Jia]'s Articles
[Chen, Xi]'s Articles
[Shen, Zhi-Qiang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ouyang, Xu-Jia]'s Articles
[Chen, Xi]'s Articles
[Shen, Zhi-Qiang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ouyang, Xu-Jia]'s Articles
[Chen, Xi]'s Articles
[Shen, Zhi-Qiang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

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