The HASHTAG project I. A survey of CO(3-2) emission from the star forming disc of M31 | |
Li, Zongnan15,16; Li, Zhiyuan15,16; Smith, Matthew W. L.17; Wilson, Christine D.18; Gao, Yu19; Eales, Stephen A.17; Ao, Yiping19; Bureau, Martin20,21; Chung, Aeree22; Davis, Timothy A.17 | |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
2020-02-01 | |
卷号 | 492期号:1页码:195-209 |
关键词 | ISM: molecules galaxies: individual (M 31) galaxies: ISM |
ISSN号 | 0035-8711 |
DOI | 10.1093/mnras/stz3409 |
产权排序 | 第13完成单位 |
文献子类 | Article |
英文摘要 | We present a CO(3-2) survey of selected regions in the M31 disc as part of the JCMT large programme, HARP and SCUBA-2 High-Resolution Terahertz Andromeda Galaxy Survey (HASHTAG). The 12 CO(3-2) fields in this survey cover a total area of 60 arcmin(2), spanning a deprojected radial range of 2-14 kpc across the M31 disc. Combining these observations with existing IRAM 30m CO(1-0) observations and JCMT CO(3-2) maps of the nuclear region of M31, as well as dust temperature and star formation rate surface density maps, we are able to explore the radial distribution of the CO(3-2)/CO(1-0) integrated intensity ratio (R-31) and its relationship with dust temperature and star formation. We find that the value of R-31 between 2 and 9 kpc galactocentric radius is 0.14, significantly lower than what is seen in the nuclear ring at 1 kpc (R-31 similar to 0.8), only to rise again to 0.27 for the fields centred on the 10 kpc star forming ring. We also found that R-31 is positively correlated with dust temperature, with Spearman's rank correlation coefficient rho = 0.55. The correlation between star formation rate surface density and CO(3-2) intensity is much stronger than with CO(1-0), with rho = 0.54 compared to -0.05, suggesting that the CO(3-2) line traces warmer and denser star forming gas better. We also find that R-31 correlates well with star formation rate surface density, with rho = 0.69. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
资助项目 | National Key Research and Development Program of China[2017YFA0402700] ; National Key Research and Development Program of China[2017YFA0402703] ; National Key Research and Development Program of China[2017YFA0402704] ; Science and Technology Facilities Council of the United Kingdom ; JCMT project[M17BL005] ; National Natural Science Foundation of China[11873028] ; National Natural Science Foundation of China[11861131007] ; National Natural Science Foundation of China[11420101002] ; National Natural Science Foundation of China[11873086] ; National Natural Science Foundation of China[U1631237] ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH008] ; Natural Science and Engineering Research Council of Canada ; Canada Research Chairs program ; Chinese Academy of Sciences (CAS) ; National Commission for Scientific and Technological Research of Chile (CONICYT) through a CAS-CONICYT Joint Postdoctoral Fellowship ; Ministry of Science and Technology of Taiwan[MOST107-2119-M-001-031-MY3] ; Academia Sinica[AS-IA-106-M03] ; National Science Centre, Poland through the SONATA BIS grant[2018/30/E/ST9/00208] ; Yunnan Province of China[2017HC018] |
WOS关键词 | MASSIVE MOLECULAR CLOUDS ; NEARBY GALAXIES ; FORMATION LAW ; CO EMISSION ; INNER DISK ; J=3-2 SURVEY ; GAS ; DUST ; DENSITY ; TEMPERATURE |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000512329900013 |
资助机构 | National Key Research and Development Program of China[2017YFA0402700, 2017YFA0402703, 2017YFA0402704] ; Science and Technology Facilities Council of the United Kingdom ; JCMT project[M17BL005] ; National Natural Science Foundation of China[11873028, 11861131007, 11420101002, 11873086, U1631237] ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH008] ; Natural Science and Engineering Research Council of Canada ; Canada Research Chairs program ; Chinese Academy of Sciences (CAS) ; National Commission for Scientific and Technological Research of Chile (CONICYT) through a CAS-CONICYT Joint Postdoctoral Fellowship ; Ministry of Science and Technology of Taiwan[MOST107-2119-M-001-031-MY3] ; Academia Sinica[AS-IA-106-M03] ; National Science Centre, Poland through the SONATA BIS grant[2018/30/E/ST9/00208] ; Yunnan Province of China[2017HC018] |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/22402] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Li, Zongnan; Li, Zhiyuan; Smith, Matthew W. L. |
作者单位 | 1.Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2.Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B-9000 Gent, Belgium 3.Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK 4.Max Planck Institute for Astronomy (MPIA), K¨onigstuhl 17, D-69117 Heidelberg, Germany 5.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 830011 Urumqi, China 6.East Asian Observatory, 660 N. A‘oh¯ok¯u Place, University Park, Hilo, HI 96720, USA 7.Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, ul. Słoneczna 36, PL-60-286 Pozna´n, Poland 8.National Optical Astronomy Observatory, 950 N. Cherry Avenue, Tucson, AZ 85719, USA 9.Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK 10.Academia Sinica, Institute of Astronomy and Astrophysics, 11F Astronomy-Mathematics Building, NTU/AS campus, No. 1, Section 4, Roosevelt Rd., Taipei 10617, Taiwan |
推荐引用方式 GB/T 7714 | Li, Zongnan,Li, Zhiyuan,Smith, Matthew W. L.,et al. The HASHTAG project I. A survey of CO(3-2) emission from the star forming disc of M31[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,492(1):195-209. |
APA | Li, Zongnan.,Li, Zhiyuan.,Smith, Matthew W. L..,Wilson, Christine D..,Gao, Yu.,...&Zhu, Ming.(2020).The HASHTAG project I. A survey of CO(3-2) emission from the star forming disc of M31.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,492(1),195-209. |
MLA | Li, Zongnan,et al."The HASHTAG project I. A survey of CO(3-2) emission from the star forming disc of M31".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 492.1(2020):195-209. |
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