中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 新疆天文台
  3. 研究单元未命名
  4. 射电天文研究室
  5. 恒星形成与演化研究团组
A FAST survey of H I narrow-line self-absorptions in Planck Galactic cold clumps guided by HC3N

文献类型：期刊论文

作者Liu, Xunchuan7,8,9; Wu, Yuefang8,9; Zhang, Chao6,9; Tang, Ningyu4,5; Liu, Tie7; Wang, Ke8; Li, Di3,4; Qian, Lei4; Qin, Sheng-Li6; Esimbek, Jarken2
刊名ASTRONOMY & ASTROPHYSICS
出版日期2022-02-11
卷号658页码:21
ISSN号0004-6361
关键词ISM: abundances ISM: clouds ISM: molecules ISM: kinematics and dynamics stars: formation
DOI10.1051/0004-6361/202141477
通讯作者Liu, Xunchuan(liuxunchuan@qq.com)
英文摘要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.
WOS关键词MOLECULAR-HYDROGEN FORMATION ; CARBON-CHAIN-CHEMISTRY ; DARK CLOUDS ; EVOLUTION ; CORES ; GAS ; ABUNDANCE ; OUTFLOWS ; REGIONS ; COLLISIONS
资助项目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研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:000754052500009
资助机构National Key R&D Program of China ; NSFC ; National Science Foundation of China ; High-performance Computing Platform of Peking University through the Peking University
源URL[http://ir.xao.ac.cn/handle/45760611-7/4513]  
专题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
通讯作者Liu, Xunchuan
作者单位1.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210033, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
3.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
5.Anhui Normal Univ, Dept Phys, Wuhu 241002, Anhui, Peoples R China
6.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
7.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
8.Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
9.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
推荐引用方式
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,2022,658:21.
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,658,21.
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):21.

入库方式： OAI收割

来源：新疆天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。