Three-dimensional Projection Effects on Chemistry in a Planck Galactic Cold Clump | |
Ge, J. X.4; Mardones, Diego3,4; He JH(何金华)1,2,4; Rawlings, Jonathan M. C.13; Liu, Sheng-Yuan12; Lee, Jeong-Eun11; Tatematsu, Ken'ichi9,10; Liu, Tie5,8; Zhu, Lei1; Chang, Qiang15 | |
刊名 | ASTROPHYSICAL JOURNAL |
2020-03-01 | |
卷号 | 891期号:1页码:13 |
关键词 | Astrochemistry Dense interstellar clouds Interstellar abundances Chemical abundances |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ab7007 |
产权排序 | 第3完成单位 |
文献子类 | Article |
英文摘要 | Offsets of molecular line emission peaks from continuum peaks are very common but frequently difficult to explain with a single spherical cloud chemical model. We propose that the spatial projection effects of an irregular three-dimensional (3D) cloud structure can be a solution. This work shows that the idea can be successfully applied to the Planck cold clump G224.4-0.6 by approximating it with four individual spherically symmetric cloud cores whose chemical patterns overlap with each other to produce observable line maps. With the empirical physical structures inferred from the observation data of this clump and a gas-grain chemical model, the four cores can satisfactorily reproduce its 850 mu m continuum map and the diverse peak offsets of CCS, HC3N, and N2H+ simultaneously at chemical ages of about 8 x 10(5) similar to 3 x 10(6) yr. The 3D projection effects on chemistry has the potential to explain such asymmetrical distributions of chemicals in many other molecular clouds. |
学科主题 | 天文学 ; 恒星与银河系 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | FONDECYT[3170768] ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; CONICYT[Basal AFB-170002] ; National Natural Science Foundation of China[11873086] ; National Natural Science Foundation of China[U1631237] ; Yunnan Province of China[2017HC018] ; National Research Foundation of Korea[NRF-2018R1A2B6003423] ; Korea Astronomy and Space Science Institute ; CONICYT International Networks for young researchers[REDI170243] ; CONICYT International Networks for young researchers[CONICYT/PCI/REDI170243] ; CONICYT International Networks for young researchers[REDES190113] ; EACOA fellowship from the East Asia Core Observatories Association ; Chinese Academy of Sciences (CAS) |
WOS关键词 | STARLESS CORE ; DENSE CORES ; DARK CLOUDS ; DEPLETION ; EVOLUTION ; MODELS ; N2H+ |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000518952200001 |
资助机构 | FONDECYT[3170768] ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; CONICYT[Basal AFB-170002] ; National Natural Science Foundation of China[11873086, U1631237] ; Yunnan Province of China[2017HC018] ; National Research Foundation of Korea[NRF-2018R1A2B6003423] ; Korea Astronomy and Space Science Institute ; CONICYT International Networks for young researchers[REDI170243, CONICYT/PCI/REDI170243, REDES190113] ; EACOA fellowship from the East Asia Core Observatories Association ; Chinese Academy of Sciences (CAS) |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/22530] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Ge, J. X. |
作者单位 | 1.Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 2.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People's Republic of China 3.Centre for Astrochemical Studies, Max-Planck-Institute for Extraterrestrial Physics, Giessenbachstrasse 1, D-85748, Garching, Germany 4.Departamento de Astronomía, Universidad de Chile, Camino el Observatorio 1515, Las Condes, Santiago, Chile 5.East Asian Observatory, 660 N. A'ohoku Place, Hilo, HI 96720, USA 6.National Astronomical Observatory of China, Datun Road 20, Chaoyang, Beijing, 100012, People's Republic of China 7.CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, People's Republic of China 8.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China 9.Department of Astronomical Science, SOKENDAI (The Graduate University for Advanced Studies), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 10.National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan |
推荐引用方式 GB/T 7714 | Ge, J. X.,Mardones, Diego,He JH,et al. Three-dimensional Projection Effects on Chemistry in a Planck Galactic Cold Clump[J]. ASTROPHYSICAL JOURNAL,2020,891(1):13. |
APA | Ge, J. X..,Mardones, Diego.,He JH.,Rawlings, Jonathan M. C..,Liu, Sheng-Yuan.,...&Feng, S..(2020).Three-dimensional Projection Effects on Chemistry in a Planck Galactic Cold Clump.ASTROPHYSICAL JOURNAL,891(1),13. |
MLA | Ge, J. X.,et al."Three-dimensional Projection Effects on Chemistry in a Planck Galactic Cold Clump".ASTROPHYSICAL JOURNAL 891.1(2020):13. |
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