PMO OpenIR  > 太阳活动的多波段观测研究团组
EVOLUTION OF OH AND CO-DARK MOLECULAR GAS FRACTION ACROSS A MOLECULAR CLOUD BOUNDARY IN TAURUS
Xu, Duo1,2; Li, Di1,3; Yue, Nannan1,2; Goldsmith, Paul F.4
2016-03-01
Source PublicationASTROPHYSICAL JOURNAL
Volume819Issue:1
AbstractWe present observations of (CO)-C-12 J = 1-0, (CO)-C-13 J = 1-0, H I, and all four ground-state transitions of the hydroxyl (OH) radical toward a sharp boundary region of the Taurus molecular cloud. Based on a photodissociation region (PDR) model that reproduces CO and [C I] emission from the same region, we modeled the three OH transitions, 1612, 1665, and 1667 MHz successfully through escape probability non-local thermal equilibrium radiative transfer model calculations. We could not reproduce the 1720 MHz observations, due to unmodeled pumping mechanisms, of which the most likely candidate is a C-shock. The abundance of OH and CO-dark molecular gas is well-constrained. The OH abundance [OH]/[H-2] decreases from 8 x 10(-7) to 1 x 10(-7) as A, increases from 0.4 to 2.7 mag following an empirical law:
KeywordEvolution Ism: Clouds Ism: Individual Objects (Taurus) Ism: Molecules
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/819/1/22
WOS KeywordINTERSTELLAR DUST CLOUDS ; DIFFUSE CLOUDS ; MAGNETOHYDRODYNAMIC SHOCKS ; LINE EMISSION ; EXCITATION ; COLLISIONS ; HYDROGEN ; MASERS ; RATIO ; CH
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000372303400022
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16175
Collection太阳活动的多波段观测研究团组
Affiliation1.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China
4.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
Recommended Citation
GB/T 7714
Xu, Duo,Li, Di,Yue, Nannan,et al. EVOLUTION OF OH AND CO-DARK MOLECULAR GAS FRACTION ACROSS A MOLECULAR CLOUD BOUNDARY IN TAURUS[J]. ASTROPHYSICAL JOURNAL,2016,819(1).
APA Xu, Duo,Li, Di,Yue, Nannan,&Goldsmith, Paul F..(2016).EVOLUTION OF OH AND CO-DARK MOLECULAR GAS FRACTION ACROSS A MOLECULAR CLOUD BOUNDARY IN TAURUS.ASTROPHYSICAL JOURNAL,819(1).
MLA Xu, Duo,et al."EVOLUTION OF OH AND CO-DARK MOLECULAR GAS FRACTION ACROSS A MOLECULAR CLOUD BOUNDARY IN TAURUS".ASTROPHYSICAL JOURNAL 819.1(2016).
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