EVOLUTION OF OH AND CO-DARK MOLECULAR GAS FRACTION ACROSS A MOLECULAR CLOUD BOUNDARY IN TAURUS

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 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, Duo 1,2; Li, Di 1,3; Yue, Nannan 1,2; Goldsmith, Paul F.4
刊名	ASTROPHYSICAL JOURNAL
	2016-03-01
卷号	819 期号:1
关键词	evolution ISM: clouds ISM: individual objects (Taurus) ISM: molecules
英文摘要	We 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:
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	INTERSTELLAR DUST CLOUDS ; DIFFUSE CLOUDS ; MAGNETOHYDRODYNAMIC SHOCKS ; LINE EMISSION ; EXCITATION ; COLLISIONS ; HYDROGEN ; MASERS ; RATIO ; CH
收录类别	SCI
语种	英语
WOS记录号	WOS:000372303400022
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16175]
专题	紫金山天文台_太阳活动的多波段观测研究团组
作者单位	1.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
推荐引用方式 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).