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Pilot Hi survey of Planck Galactic Cold Clumps with FAST

文献类型：期刊论文

作者Tang, Ning-Yu1,2; Zuo, Pei3; Li, Di1,2,6; Qian, Lei1,2; Liu, Tie5,7; Wu, Yue-Fang4; Krco, Marko1,2; Liu, Meng-Ting1,2; Yue, You-Ling1,2; Zhu, Yan1,2
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2020-05-01
卷号20期号:5页码:12
关键词ISM clouds ISM evolution ISM molecules
ISSN号1674-4527
DOI10.1088/1674-4527/20/5/77
英文摘要We present a pilot Hi survey of 17 Planck Galactic Cold Clumps (PGCCs) with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Hi Narrow Self-Absorption (HINSA) is an effective method to detect cold Hi being mixed with molecular hydrogen H-2 and improves our understanding of the atomic to molecular transition in the interstellar medium. HINSA was found in 58% PGCCs that we observed. The column density of HINSA was found to have an intermediate correlation with that of (CO)-C-13, following (N(HINSA)) = (0.52 +/- 0.26) ((NCO)-C-13) + (10 +/- 4.1). Hi abundance relative to total hydrogen [Hi]/[H] has an average value of 4.4 x 10(-3), which is about 2.8 times of the average value of previous HINSA surveys toward molecular clouds. For clouds with total column density N-H > 5 x 10(20) cm(-2), an inverse correlation between HINSA abundance and total hydrogen column density is found, confirming the depletion of cold Hi gas during molecular gas formation in more massive clouds. Non-thermal line width of (CO)-C-13 is about 0-0.5 km s(-1) larger than that of HINSA. One possible explanation of narrower non-thermal width of HINSA is that HINSA region is smaller than that of (CO)-C-13. Based on an analytic model of H-2 formation and H-2 dissociation by cosmic ray, we found the cloud ages to be within 10(6.7) - 10(7.0) yr for five sources.
WOS关键词NARROW SELF-ABSORPTION ; CLOUDS ; TURBULENCE ; HYDROGEN ; GAS
资助项目National Key R&D Program of China[2017YFA0402600] ; National Key R&D Program of China[2016YFA0400702] ; National Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11803051] ; National Natural Science Foundation of China[11725313] ; National Natural Science Foundation of China[11721303] ; CAS International Partnership Program[114A11KYSB20160008] ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; Youth Innovation Promotion Association of CAS[2018075]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000536710200001
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; CAS "Light of West China" Program, CAS Interdisciplinary Innovation Team and Young Researcher Grant of National Astronomical Observatories, CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS
源URL[http://ir.bao.ac.cn/handle/114a11/54573]  
专题中国科学院国家天文台
通讯作者Tang, Ning-Yu
作者单位1.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
3.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
4.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
5.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
6.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
7.East Asian Observ, 660 North Aohoku Pl, Hilo, HI 96720 USA
推荐引用方式
GB/T 7714		 Tang, Ning-Yu,Zuo, Pei,Li, Di,et al. Pilot Hi survey of Planck Galactic Cold Clumps with FAST[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(5):12.
APA Tang, Ning-Yu.,Zuo, Pei.,Li, Di.,Qian, Lei.,Liu, Tie.,...&Liu, Shu.(2020).Pilot Hi survey of Planck Galactic Cold Clumps with FAST.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(5),12.
MLA Tang, Ning-Yu,et al."Pilot Hi survey of Planck Galactic Cold Clumps with FAST".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.5(2020):12.

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