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Institut de recherche en astrophysique et planétologie |  |
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Institut de recherche en astrophysique et planétologie | |
| HAL: hal-00707804, version 1 |
| arXiv: 1206.1243 |
| ADS Bibliographic id: 2012arXiv1206.1243H |
| DOI: 10.1051/0004-6361/201219429 |
| Detailed view |  Export this paper |
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| Astronomy and Astrophysics 543 (2012) L3 |
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| The spine of the swan: A Herschel study of the DR21 ridge and filaments in Cygnus X |
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| M. Hennemann 1F. Motte 2, 3 |
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| (2012) |
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| 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 larger than 1e23/cm^2 over a region of 2.3 pc^2. It shows substructured column density profiles and branching into two major filaments in the north. The masses in the studied filaments range between 130 and 1400 Msun whereas the mass in the ridge is 15000 Msun. 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. |
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| 1: | Astrophysique Interactions Multi-échelles (AIM) |
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CNRS : UMR7158 – INSU – Université Paris VII - Paris Diderot – CEA : DSM/IRFU |
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| 2: | Laboratoire AIM (AIM) |
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CEA – Université Paris VII - Paris Diderot |
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| 3: | Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA) (IRFU) |
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CEA : DSM/IRFU |
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| 4: | Laboratory for Atmospheric and Space Physics |
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University of Colorado |
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| 5: | Observatoire aquitain des sciences de l'univers (OASU) |
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CNRS : UMS2567 – INSU – Université Sciences et Technologies - Bordeaux I |
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| 6: | Université Sciences et Technologies - Bordeaux 1 |
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Université Sciences et Technologies - Bordeaux I |
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| 7: | Laboratoire d'Astrophysique de Bordeaux (LAB) |
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CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I |
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| 8: | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB) |
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CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I |
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| 9: | Groupe d'Etudes des Matériaux Hétérogènes (GEMH) |
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Ecole Nationale Supérieure de Céramique Industrielle – Université de Limoges : EA3178 – Institut des Procédés Appliqués aux Matériaux |
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| 10: | Centre d'étude spatiale des rayonnements (CESR) |
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CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 11: | National Research Council of Canada, Herzberg Institute of Astrophysics |
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Herzberg Institute of Astrophysics |
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| 12: | National Astronomical Observatories |
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Chinese Academy of Sciences |
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| 13: | Laboratoire des Lois de Comportement du Combustible (LLCC) |
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CEA : DEN/DEC/SESC/LLCC |
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| 14: | Interplanetary Space Physics Institute (IFSI) (IFSI-INAF) |
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Interplanetary Space Physics Institute |
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| 15: | Antarctic Research a European Network for Astrophysics (ARENA) |
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CEA |
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| 16: | Centre de Recherche Astrophysique de Lyon (CRAL) |
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CNRS : UMR5574 – INSU – Université Claude Bernard - Lyon I – École Normale Supérieure - Lyon |
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| 17: | School of Physics & Astronomy |
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Cardiff University |
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| 18: | Engineering Department |
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University of Cambridge |
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| FORMATION STELLAIRE 2012 |
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| Subject | : | Sciences of the Universe/Astrophysics/Solar and Stellar Astrophysics Physics/Astrophysics/Solar and Stellar Astrophysics |
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| Fulltext link: |
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| http://fr.arXiv.org/abs/1206.1243 |
| hal-00707804, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00707804 | |
| oai:hal.archives-ouvertes.fr:hal-00707804 | |
| From: Marie-Paule Pomies | |
| Submitted on: Wednesday, 13 June 2012 15:08:20 | |
| Updated on: Tuesday, 3 July 2012 10:56:57 | |
