The HASHTAG project I. A survey of CO(3-2) emission from the star forming disc of M31

doi:10.1093/mnras/stz3409

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	The HASHTAG project I. A survey of CO(3-2) emission from the star forming disc of M31
	Li, Zongnan 2,5; Li, Zhiyuan 2,5; Smith, Matthew W. L.4; Wilson, Christine D.3; Gao, Yu 29,30; Eales, Stephen A.4; Ao, Yiping 29,30; Bureau, Martin 26,27,28; Chung, Aeree 26; Davis, Timothy A.4
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	25
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.
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 ; Science and Technology Facilities Council of the United Kingdom ; JCMT project ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; 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 ; Academia Sinica ; National Science Centre, Poland through the SONATA BIS grant ; Yunnan Province of China
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3366]
专题	研究单元未命名
通讯作者	Li, Zongnan; Li, Zhiyuan; Smith, Matthew W. L.
作者单位	1.Natl Opt Astron Observ, 950 N Cherry Ave, Tucson, AZ 85719 USA 2.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China 3.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada 4.Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales 5.Nanjing Univ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Peoples R China 6.Natl Astron Observ China, 20A Datun Rd, Beijing 100012, Peoples R China 7.Univ Ghent, Sterrenkundig Observ, Krijgslaan 281, B-9000 Ghent, Belgium 8.Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England 9.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 10.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
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.