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| A FAST survey of H I narrow-line self-absorptions in Planck Galactic cold clumps guided by HC3N | |
Liu, Xunchuan1,2,3; Wu, Yuefang1,2; Zhang, Chao1,4; Tang, Ningyu5,6; Liu, Tie3; Wang, Ke2; Li, Di6,7; Qian, Lei6; Qin, Sheng-Li4; Esimbek, Jarken8 ; Wang, Junzhi3; Yuan, Jinghua6; Xu, Fengwei1,2; Yuan, Lixia9
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| 2022-02-11 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
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| ISSN | 0004-6361 |
| Volume | 658Pages:A140 |
| Contribution Rank | 8 |
| Abstract | Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we search for H I narrow-line self-absorption (HINSA) features in twelve Planck Galactic cold clumps (PGCCs), the starless core L1521B, and four star forming sources. Eight of the 12 PGCCs have detected emission of J = 2-1 of cyanoacetylene (HC3N). With an improved HINSA extraction method more robust for weaker and blended features with high velocity resolution, the detection rates of HINSA in PGCCs are high, at 92% overall (11/12) and 87% (7/8) among sources with HC3N J = 2-1 emissions. Combining the data of molecular spectra and Planck continuum maps, we studied the morphologies, dynamics, abundances and excitations of H I , CO and HC3N in PGCCs. The spatial distribution of HINSA is similar to that of CO, implying that HINSA features are confined to regions within and around CO emission kernels. HINSA tends to be not detected in regions associated with warm dust and background ionizing radiation, as well as regions associated with stellar objects. The L-band continnum and average background H I emission may be non-ignorable for the excitation of HINSA. The abundances of cold H I in PGCCs are approximately 3 x 10(-4), and vary within a factor of similar to 3. The non-thermal velocity dispersions traced by (CO)-O-18 = 1-0 and HINSA are consistent with each other (0.1-0.4 km s(-1)), larger than the typical value of HC3N (-0.1 km s(-1)). Carbon chain molecule (CCM) abundant PGCCs provide a good sample to study HINSA. |
| Keyword | ISM: abundances ISM: clouds ISM: molecules ISM: kinematics and dynamics stars: formation |
| DOI | 10.1051/0004-6361/202141477 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MOLECULAR-HYDROGEN FORMATION ; CARBON-CHAIN-CHEMISTRY ; DARK CLOUDS ; EVOLUTION ; CORES ; GAS ; ABUNDANCE ; OUTFLOWS ; REGIONS ; COLLISIONS |
| Funding Project | National Key R&D Program of China[2017YFA0402600] ; National Key R&D Program of China[2018YFE0202900] ; NSFC[12033005] ; NSFC[11433008] ; NSFC[11725313] ; NSFC[11373009] ; NSFC[11503035] ; NSFC[11573036] ; NSFC[11803051] ; National Science Foundation of China[12041305] ; National Science Foundation of China[11973013] ; High-performance Computing Platform of Peking University through the Peking University[0000057511] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000754052500009 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | National Key R&D Program of China ; NSFC ; National Science Foundation of China ; High-performance Computing Platform of Peking University through the Peking University |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4514 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 科研仪器设备产出_我台利用FAST观测数据文章 |
| Corresponding Author | Liu, Xunchuan; Wu, Yuefang |
| Affiliation | 1.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China 5.Anhui Normal Univ, Dept Phys, Wuhu 241002, Anhui, Peoples R China 6.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 7.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa 8.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 9.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210033, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Xunchuan,Wu, Yuefang,Zhang, Chao,et al. A FAST survey of H I narrow-line self-absorptions in Planck Galactic cold clumps guided by HC3N[J]. ASTRONOMY & ASTROPHYSICS,2022,658:A140. |
| APA | Liu, Xunchuan.,Wu, Yuefang.,Zhang, Chao.,Tang, Ningyu.,Liu, Tie.,...&Yuan, Lixia.(2022).A FAST survey of H I narrow-line self-absorptions in Planck Galactic cold clumps guided by HC3N.ASTRONOMY & ASTROPHYSICS,658,A140. |
| MLA | Liu, Xunchuan,et al."A FAST survey of H I narrow-line self-absorptions in Planck Galactic cold clumps guided by HC3N".ASTRONOMY & ASTROPHYSICS 658(2022):A140. |
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| Liu-2022-A FAST surv（2708KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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