Pilot Hi survey of Planck Galactic Cold Clumps with FAST
Pilot Hi survey of Planck Galactic Cold Clumps with FAST
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Pilot Hi 利用 FAST 对普朗克星系冷团块进行调查
DOI:
10.1088/1674-4527/20/5/77
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发表时间:
2019-12
影响因子:
1.8
通讯作者:
Liu Shu
中科院分区:
文献类型:
--
作者:
Tang Ning-Yu;Zuo Pei;Li Di;Qian Lei;Liu Tie;Wu Yue-Fang;Krco Marko;Liu Meng-Ting;Yue You-Ling;Zhu Yan;Liu Hong-Fei;Yu Dong-Jun;Sun Jing-Hai;Jiang Peng;Pan Gao-Feng;Li Hui;Gan Heng-Qian;Yao Rui;Liu Shu
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 H2 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 13CO, following (N(HINSA)) = (0.52 ± 0.26) (N13CO) + (10 ± 4.1). Hi abundance relative to total hydrogen [Hi]/[H] has an average value of 4.4 × 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 NH > 5 × 1020 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 13CO 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 13CO. Based on an analytic model of H2 formation and H2 dissociation by cosmic ray, we found the cloud ages to be within 106.7 – 107.0 yr for five sources.
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DOI:
10.3847/0067-0049/222/1/7
发表时间:
2016
期刊:
Astrophysical Journal, The Supplement Series
影响因子:
--
作者:
Liu Tie;Zhang Qizhou;Kim Kee-Tae;Wu Yuefang;Lee Chang Won;Lee Jeong-Eun;Tatematsu Ken'ichi;Choi Minho;Juvela Mika;Thompson Mark;Goldsmith Paul F.;Liu Sheng-yuan;Naomi Hirano;Koch Patrick;Henkel Christian;Sanhueza Patricio;He JinHua;Rivera-Ingraham Alana;W
通讯作者:
W
DOI:
10.1086/430296
发表时间:
2004-12
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Kavars;J. Dickey;J. Dickey;N. McClure-Griffiths;B. Gaensler;A. J. Green
通讯作者:
D. Kavars;J. Dickey;J. Dickey;N. McClure-Griffiths;B. Gaensler;A. J. Green
DOI:
10.1088/0067-0049/202/1/4
发表时间:
2012-07
期刊:
Astrophysical Journal, The - Supplement Series
影响因子:
--
作者:
Liu, Tie;Wu, Yuefang;Zhang, Huawei
通讯作者:
Zhang, Huawei
DOI:
10.3847/1538-4357/aad571
发表时间:
2018-10
期刊:
The Astrophysical Journal
影响因子:
--
作者:
P. Zuo;Di Li;J. Peek;J. Peek;Q. Chang;Xia Zhang;N. Chapman;P. Goldsmith;Zhi-Yu Zhang
通讯作者:
P. Zuo;Di Li;J. Peek;J. Peek;Q. Chang;Xia Zhang;N. Chapman;P. Goldsmith;Zhi-Yu Zhang
DOI:
10.1086/425978
发表时间:
2004-09
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
M. Heyer;C. Brunt
通讯作者:
M. Heyer;C. Brunt