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Star formation in the Rosette molecular cloud under the influence of NGC 2244

Published online by Cambridge University Press:  25 November 2011

N. Schneider
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
F. Motte
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
S. Bontemps
Affiliation:
OASU Bordeaux, 33271 Floirac Cedex, France
M. Hennemann
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
P. Tremblin
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
V. Minier
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
E. Audit
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
J. Di Francesco
Affiliation:
NRC, Herzberg Institute of Astrophysics, University of Victoria, Canada
Ph. André
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
T. Hill
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
T. Csengeri
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
Q. Ngyuen-Luong
Affiliation:
IRFU/SAp CEA-Saclay, 91191 Gif-sur-Yvette, France
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Abstract

The Rosette molecular cloud has a characteristic morphology, where the central OB cluster NGC 2244 has blown a circular-shaped cavity into the cloud and the expanding HII-region now interacts with the cloud. We use continuum data obtained with the PACS (70 and 160 μm) and SPIRE instruments (250, 350, 500 μm) of the Herschel telescope to investigate the spatial distribution of cold and warm gas and to locate all star-forming sites in Rosette. We detected a clear negative temperature gradient and a positive density gradient (running from the HII-region/molecular cloud interface into the cloud), and an age-sequence (from more evolved to younger) with increasing distance to the cluster NGC 2244. The existence of such temperature and density gradients and the observed age-sequence imply that star formation in Rosette may indeed be influenced by the radiative impact of the central NGC 2244 cluster.

Type
Research Article
Copyright
© EAS, EDP Sciences 2011

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