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Evidence of evolution in the dense cores in massive star forming regions
Zhou, JJ; Esimbek, J; Sun, JX; Ju, BG; Sun, JJ
2005
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
ISSN1009-9271
Volume5Issue:4Pages:363-370
AbstractThe excitation of H2O masers usually needs very high density gas, hence it can serve as a marker of dense gas in HII region. We selected a sample of H2O maser sources from Plume et al. (four with, and four without detected CS(J = 7 - 6) emission), and observed them ill (CO)-C-13(j = 1-0) and (CO)-O-18 (j = 1-0). (CO)-O-18 (J = 1-0) emission was detected only in three of the sources with detected CS(J = 7-6) emission. An analysis combined with some data in the literature suggests that these dense cores may be located at different evolutionary stages. Multi-line observation study may provide us clues on the evolution of massive star forming regions and the massive stars themselves.
KeywordIsm : Molecules Masers Radio Lines : Ism-stars : Formation
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordW3 MOLECULAR CLOUD ; H2O MASERS ; INFRARED SOURCES ; LINE ; (CO)-C-13 ; EMISSION ; OUTFLOW ; IMAGES ; L1287
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000231442100004
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4042
Collection期刊(老文献)
Affiliation1.Chinese Acad Sci, Urumqi Observ, Natl Astron Observ, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Qinghai Stn, Purple Mt Observ, Delingha 817000, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Zhou, JJ,Esimbek, J,Sun, JX,et al. Evidence of evolution in the dense cores in massive star forming regions[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2005,5(4):363-370.
APA Zhou, JJ,Esimbek, J,Sun, JX,Ju, BG,&Sun, JJ.(2005).Evidence of evolution in the dense cores in massive star forming regions.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,5(4),363-370.
MLA Zhou, JJ,et al."Evidence of evolution in the dense cores in massive star forming regions".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 5.4(2005):363-370.
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