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A 100 pc ELLIPTICAL AND TWISTED RING OF COLD AND DENSE MOLECULAR CLOUDS REVEALED BY HERSCHEL AROUND THE GALACTIC CENTER
Molinari, S.1; Bally, J.2; Noriega-Crespo, A.3; Compiegne, M.3; Bernard, J. P.4,5; Paradis, D.4; Martin, P.6; Testi, L.7,8; Barlow, M.9; Moore, T.10; Plume, R.11; Swinyard, B.9,12; Zavagno, A.13; Calzoletti, L.14; Di Giorgio, A. M.1; Elia, D.1; Faustini, F.14; Natoli, P.14,15; Pestalozzi, M.1; Pezzuto, S.1; Piacentini, F.16; Polenta, G.14; Polychroni, D.1; Schisano, E.1; Traficante, A.17; Veneziani, M.16; Battersby, C.2; Burton, M.18; Carey, S.3; Fukui, Y.19; Li, J. Z.20; Lord, S. D.29; Morgan, L.10; Motte, F.21; Schuller, F.22; Stringfellow, G. S.2; Tan, J. C.23,24; Thompson, M. A.25; Ward-Thompson, D.26; White, G.12,27; Umana, G.28
2011-07-10
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号735期号:2
摘要Thermal images of cold dust in the Central Molecular Zone of the Milky Way, obtained with the far-infrared cameras on board the Herschel satellite, reveal a similar to 3 x 10(7) M-circle dot ring of dense and cold clouds orbiting the Galactic center. Using a simple toy model, an elliptical shape having semi-major axes of 100 and 60 pc is deduced. The major axis of this 100 pc ring is inclined by about 40 degrees with respect to the plane of the sky and is oriented perpendicular to the major axes of the Galactic Bar. The 100 pc ring appears to trace the system of stable x(2) orbits predicted for the barred Galactic potential. Sgr A* is displaced with respect to the geometrical center of symmetry of the ring. The ring is twisted and its morphology suggests a flattening ratio of 2 for the Galactic potential, which is in good agreement with the bulge flattening ratio derived from the 2MASS data.
关键词Galaxy: Center Ism: Clouds Stars: Formation
DOI10.1088/2041-8205/735/2/L33
收录类别SCI
语种英语
WOS记录号WOS:000293138000009
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8024
专题应用天文研究部
作者单位1.INAF Ist Fis Spazio Interplanetario, I-00133 Rome, Italy
2.Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA
3.CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA
4.IRAP, CNRS, F-31028 Toulouse 4, France
5.Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse 4, France
6.Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 1A1, Canada
7.European So Observ, D-85748 Garching, Germany
8.INAF Osservatorio Astrofis Arcetri, I-50125 Florence, Italy
9.UCL, Dept Phys & Astron, London, England
10.Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5UX, Merseyside, England
11.Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada
12.Rutherford Appleton Labs, STFC, Didcot, Oxon, England
13.Univ Aix Marseille 1, LAM, Marseille, France
14.Agenzia Spaziale Italiana ASI Sci Data Ctr, I-00044 Rome, Italy
15.Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy
16.Univ Roma 1 La Sapienza, Dipartimento Fis, Rome, Italy
17.Univ Roma Tor Vergata, Dipartimento Fis, Rome, Italy
18.Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia
19.Nagoya Univ, Dept Astrophys, Nagoya, Aichi 464, Japan
20.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
21.Univ Paris Diderot, CEA DSM INSU CNRS, Lab AIM, IRFU SAp CEA Saclay, F-91191 Gif Sur Yvette, France
22.MPIfR MPG, Bonn, Germany
23.Univ Florida, Dept Astron, Gainesville, FL 32611 USA
24.Univ Florida, Dept Phys, Gainesville, FL 32611 USA
25.Univ Hertfordshire, Ctr Astrophys Res, Sci & Technol Res Inst, Hatfield AL10 9AB, Herts, England
26.Cardiff Univ, Sch Phys & Astron, Cardiff, S Glam, Wales
27.Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England
28.INAF Osservatorio Astrofis Catania, Catania, Italy
29.CALTECH, NASA Herschel Sci Ctr, Pasadena, CA 91125 USA
推荐引用方式
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Molinari, S.,Bally, J.,Noriega-Crespo, A.,et al. A 100 pc ELLIPTICAL AND TWISTED RING OF COLD AND DENSE MOLECULAR CLOUDS REVEALED BY HERSCHEL AROUND THE GALACTIC CENTER[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,735(2).
APA Molinari, S..,Bally, J..,Noriega-Crespo, A..,Compiegne, M..,Bernard, J. P..,...&Umana, G..(2011).A 100 pc ELLIPTICAL AND TWISTED RING OF COLD AND DENSE MOLECULAR CLOUDS REVEALED BY HERSCHEL AROUND THE GALACTIC CENTER.ASTROPHYSICAL JOURNAL LETTERS,735(2).
MLA Molinari, S.,et al."A 100 pc ELLIPTICAL AND TWISTED RING OF COLD AND DENSE MOLECULAR CLOUDS REVEALED BY HERSCHEL AROUND THE GALACTIC CENTER".ASTROPHYSICAL JOURNAL LETTERS 735.2(2011).
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