NAOC Open IR
An ATCA Survey of HI Absorption in the Magellanic Clouds. I. H I Gas Temperature Measurements in the Small Magellanic Cloud
Jameson, Katherine E.1; McClure-Griffiths, N. M.1; Liu, Boyang2,3; Dickey, John M.4; Staveley-Smith, Lister2,5; Stanimirovic, Snezana6; Dempsey, James1,7; Dawson, J. R.8,9; Denes, Helga10; Bolatto, Alberto D.11; Li, Di3,12; Wong, Tony1,2,13
2019-09-01
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN0067-0049
Volume244Issue:1Pages:17
AbstractWe present the first results from the Small Magellanic Cloud portion of a new Australia Telescope Compact Array H I absorption survey of both of the Magellanic Clouds, comprising over 800 hr of observations. Our new H I absorption line data allow us to measure the temperature and fraction of cold neutral gas in a low-metallicity environment. We observed 22 separate fields, targeting a total of 55 continuum sources, against 37 of which we detected H I absorption; from this we measure a column-density-weighted mean average spin temperature of < T-s >= 150 K. Splitting the spectra into individual absorption line features, we estimate the temperatures of different gas components and find an average cold gas temperature of similar to 30 K for this sample, lower than the average of similar to 40 K in the Milky Way. The H I appears to be evenly distributed throughout the SMC, and we detect absorption in 67% of the lines of sight in our sample, including some outside the main body of the galaxy (N-H I > 2 x 10(21) cm(-2)). The optical depth and temperature of the cold neutral atomic gas show no strong trend with location spatially or in velocity. Despite the low-metallicity environment, we find an average cold gas fraction of similar to 20%, not dissimilar from that of the Milky Way.
Keywordgalaxies: ISM ISM: clouds Magellanic Clouds radio lines: ISM
Funding OrganizationAustralian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
DOI10.3847/1538-4365/ab3576
WOS KeywordNEUTRAL ATOMIC PHASES ; INTERSTELLAR-MEDIUM ; LINE SURVEY ; HYDROGEN
Language英语
Funding ProjectAustralian Government ; Australian Research Council[FT150100024] ; National Key R&D Program of China[2017YFA0402600] ; CAS International Partnership Program[114A11KYSB20160008] ; Australian Research Council (ARC) DECRA Fellowship[DE170101086] ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)[CE170100013]
Funding OrganizationAustralian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Government ; Australian Government ; Australian Research Council ; Australian Research Council ; National Key R&D Program of China ; National Key R&D Program of China ; CAS International Partnership Program ; CAS International Partnership Program ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council (ARC) DECRA Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000485151900003
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/27711
Collection中国科学院国家天文台
Corresponding AuthorJameson, Katherine E.
Affiliation1.Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia
2.Univ Western Australia, ICRAR, Crawley, WA 6009, Australia
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Tasmania, Sch Nat Sci, Private Bag 37, Hobart, Tas 7001, Australia
5.ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Melbourne, Vic, Australia
6.Univ Wisconsin, Dept Astron, Madison, WI 53706 USA
7.CSIRO, Informat Management & Technol, POB 225, Dickson, ACT 2602, Australia
8.Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia
9.Macquarie Univ, MQ Res Ctr Astron Astrophys & Astrophoton, N Ryde, NSW 2109, Australia
10.Netherlands Inst Radio Astron, ASTRON, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands
11.Univ Maryland, Dept Astron, College Pk, MD 20742 USA
12.Chinese Acad Sci, CAS Key Lab FAST, NAOC, Beijing, Peoples R China
13.Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA
Recommended Citation
GB/T 7714
Jameson, Katherine E.,McClure-Griffiths, N. M.,Liu, Boyang,et al. An ATCA Survey of HI Absorption in the Magellanic Clouds. I. H I Gas Temperature Measurements in the Small Magellanic Cloud[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2019,244(1):17.
APA Jameson, Katherine E..,McClure-Griffiths, N. M..,Liu, Boyang.,Dickey, John M..,Staveley-Smith, Lister.,...&Wong, Tony.(2019).An ATCA Survey of HI Absorption in the Magellanic Clouds. I. H I Gas Temperature Measurements in the Small Magellanic Cloud.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,244(1),17.
MLA Jameson, Katherine E.,et al."An ATCA Survey of HI Absorption in the Magellanic Clouds. I. H I Gas Temperature Measurements in the Small Magellanic Cloud".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 244.1(2019):17.
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