The spine of the swan: a Herschel study of the DR21 ridge and filaments in Cygnus X
文献类型：期刊论文
| 作者 | Hennemann, M.1; Motte, F.1; Schneider, N.1; Didelon, P.1; Hill, T.1; Arzoumanian, D.1; Bontemps, S.2,3; Csengeri, T.4; Andre, Ph.1; Konyves, V.1 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2012-07-01 |
| 卷号 | 543 |
| 关键词 | ISM: individual objects: DR 21 ISM: general ISM: structure dust, extinction stars: formation ISM: individual objects: DR21(OH) |
| 英文摘要 | In order to characterise the cloud structures responsible for the formation of high-mass stars, we present Herschel observations of the DR21 environment. Maps of the column density and dust temperature unveil the structure of the DR21 ridge and several connected filaments. The ridge has column densities higher than 10(23) cm(-2) over a region of 2.3 pc(2). It shows substructured column density profiles and branches into two major filaments in the north. The masses in the filaments range between 130 and 1400 M-circle dot, whereas the mass in the ridge is 15 000 M-circle dot. The accretion of these filaments onto the DR21 ridge, suggested by a previous molecular line study, could provide a continuous mass inflow to the ridge. In contrast to the striations seen in, e. g., the Taurus region, these filaments are gravitationally unstable and form cores and protostars. These cores formed in the filaments potentially fall into the ridge. Both inflow and collisions of cores could be important to drive the observed high-mass star formation. The evolutionary gradient of star formation running from DR21 in the south to the northern branching is traced by decreasing dust temperature. This evolution and the ridge structure can be explained by two main filamentary components of the ridge that merged first in the south. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000306597200166 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6253]  |
| 专题 | 国家天文台_应用天文研究部 |
| 作者单位 | 1.Univ Paris Diderot, AIM Paris Saclay, CEA, DSM,IRFU,CNRS,INSU,CEA Saclay, F-91191 Gif Sur Yvette, France 2.Univ Bordeaux, LAB, UMR5804, F-33270 Floirac, France 3.CNRS, LAB, UMR5804, F-33270 Floirac, France 4.Max Planck Inst Radioastron, D-53121 Bonn, Germany 5.ESA, Herschel Sci Ctr, ESAC, Madrid 28691, Spain 6.Univ Toronto, CITA, Toronto, ON M5S 3H8, Canada 7.Univ Aix Marseille 1, Lab Astrophys Marseille, CNRS, INSU, F-13388 Marseille 13, France 8.W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA 9.Univ Toulouse 3, IRAP, CNRS, UMR 5277, F-31028 Toulouse 4, France 10.Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada |
| 推荐引用方式 GB/T 7714 | Hennemann, M.,Motte, F.,Schneider, N.,et al. The spine of the swan: a Herschel study of the DR21 ridge and filaments in Cygnus X[J]. ASTRONOMY & ASTROPHYSICS,2012,543. |
| APA | Hennemann, M..,Motte, F..,Schneider, N..,Didelon, P..,Hill, T..,...&White, G. J..(2012).The spine of the swan: a Herschel study of the DR21 ridge and filaments in Cygnus X.ASTRONOMY & ASTROPHYSICS,543. |
| MLA | Hennemann, M.,et al."The spine of the swan: a Herschel study of the DR21 ridge and filaments in Cygnus X".ASTRONOMY & ASTROPHYSICS 543(2012). |
入库方式： OAI收割
来源：国家天文台
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