PMO OpenIR  > 分子云与恒星形成研究团组
STAR-FORMING CLOUD COMPLEXES IN THE CENTRAL MOLECULAR ZONE OF NGC 253
Sakamoto, Kazushi1; Mao, Rui-Qing2; Matsushita, Satoki1,3; Peck, Alison B.3; Sawada, Tsuyoshi3,4; Wiedner, Martina C.5
2011-07-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume735Issue:1Pages:19(12)
AbstractWe report 350 and 230 GHz observations of molecular gas and dust in the starburst nucleus of NGC 253 at 20-40 pc (1 ''-2 '') resolution. The data contain CO(3-2), HCN(4-3), CO(2-1), (CO)-C-13(2-1), (CO)-O-18(2-1), and continuum at 0.87 mm and 1.3 mm toward the central kiloparsec. The CO(2-1) size of the galaxy's central molecular zone (CMZ) is measured to be about 300 pc x 100 pc at the half-maximum of intensity. Five clumps of dense and warm gas stand out in the CMZ at arcsecond resolution, and they are associated with compact radio sources due to recent massive star formation. They contribute one-third of the CO emission in the central 300 pc and have (CO)-C-12 peak brightness temperatures around 50 K, molecular gas column densities on the order of 10(4) M-circle dot pc(-2), gas masses on the order of 10(7) M-circle dot in the size scale of 20 pc, volume-averaged gas densities of n(H2) similar to 4000 cm(-3), and high HCN-to-CO ratios suggestive of higher fractions of dense gas than in the surrounding environment. It is suggested that these are natal molecular cloud complexes of massive star formation. The CMZ of NGC 253 is also compared with that of our Galaxy in CO(2-1) at the same 20 pc resolution. Their overall gas distributions are strikingly similar. The five molecular cloud complexes appear to be akin to such molecular complexes as Sgr A, Sgr B2, Sgr C, and the l = 1 degrees.3 cloud in the Galactic center. On the other hand, the starburst CMZ in NGC 253 has higher temperatures and higher surface (and presumably volume) densities than its non-starburst cousin.
KeywordGalaxies: Individual (Ngc 253) Galaxies: Ism Galaxies: Starburst
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/735/1/19
WOS KeywordSTARBURST GALAXY NGC-253 ; GALACTIC-CENTER REGION ; FAR-INFRARED EMISSION ; NEARBY GALAXIES ; DENSE GAS ; ROTATIONAL-EXCITATION ; SPATIAL-DISTRIBUTION ; SUBMILLIMETER ARRAY ; SUPERNOVA-REMNANTS ; SOUTHERN STARBURST
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000291788300019
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4397
Collection分子云与恒星形成研究团组
Affiliation1.Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
3.Joint ALMA Off, Santiago, Chile
4.Natl Astron Observ Japan, Tokyo 1818588, Japan
5.CNRS, Observ Paris, LERMA, F-75014 Paris, France
Recommended Citation
GB/T 7714
Sakamoto, Kazushi,Mao, Rui-Qing,Matsushita, Satoki,et al. STAR-FORMING CLOUD COMPLEXES IN THE CENTRAL MOLECULAR ZONE OF NGC 253[J]. ASTROPHYSICAL JOURNAL,2011,735(1):19(12).
APA Sakamoto, Kazushi,Mao, Rui-Qing,Matsushita, Satoki,Peck, Alison B.,Sawada, Tsuyoshi,&Wiedner, Martina C..(2011).STAR-FORMING CLOUD COMPLEXES IN THE CENTRAL MOLECULAR ZONE OF NGC 253.ASTROPHYSICAL JOURNAL,735(1),19(12).
MLA Sakamoto, Kazushi,et al."STAR-FORMING CLOUD COMPLEXES IN THE CENTRAL MOLECULAR ZONE OF NGC 253".ASTROPHYSICAL JOURNAL 735.1(2011):19(12).
Files in This Item:
File Name/Size DocType Version Access License
2011020STAR-FORMING (1514KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Sakamoto, Kazushi]'s Articles
[Mao, Rui-Qing]'s Articles
[Matsushita, Satoki]'s Articles
Baidu academic
Similar articles in Baidu academic
[Sakamoto, Kazushi]'s Articles
[Mao, Rui-Qing]'s Articles
[Matsushita, Satoki]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Sakamoto, Kazushi]'s Articles
[Mao, Rui-Qing]'s Articles
[Matsushita, Satoki]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2011020STAR-FORMING CLOUD COMPLEXES IN THE CENTRAL MOLECULAR ZONE OF NGC 253 .pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.