Vig, S. and Testi, L. and Walmsley, M. and Molinari, S. and Carey, S. and Noriega-Crespo, A. (2007) IRAS 18511+0146: a proto Herbig Ae/Be cluster? Astronomy and Astrophysics, 470 (3). pp. 977-989. ISSN 0004-6361 http://resolver.caltech.edu/CaltechAUTHORS:20091201-151240084
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Context. The evolution of a young protocluster depends on the relative spatial distribution and dynamics of both stars and gas. Aims. We study the distribution and properties of the gas and stars surrounding the luminous (10^4 L_☉) protocluster IRAS 18511+0146. Methods. IRAS 18511+0146 and the cluster associated with it has been investigated using the sub-millimetre (JCMT-SCUBA), infrared (Spitzer-MIPSGAL, Spitzer-GLIMPSE, Palomar) and radio (VLA) continuum data. Cluster simulations have been carried out in order to understand the properties of clusters as well as to compare with the observations. Results. The central most obscured part of the protocluster coincident with the compact sub-millimetre source found with SCUBA is responsible for at least 2/3 of the total luminosity. A number of cluster members have been identified which are bright in mid infrared and show rising (near to mid infrared) spectral energy distributions suggesting that these are very young stellar sources. In the mid infrared 8.0 μm image, a number of filamentary structures and clumps are detected in the vicinity of IRAS 18511+0146. Conclusions. Based on the luminosity and cluster size as well as on the evolutionary stages of the cluster members, IRAS 18511+0146 is likely to be protocluster with the most massive object being a precursor to a Herbig type star.
|Additional Information:||© 2007 ESO. Received 2 April 2007; accepted 18 May 2007. We would like to thank R. Cesaroni for his help and suggestions.|
|Subject Keywords:||stars: formation; stars: pre-main sequence; infrared: ISM; submillimeter; stars: individual: IRAS 18511+0146|
|Official Citation:||IRAS 18511+0146: a proto Herbig Ae/Be cluster? S. Vig, L. Testi, M. Walmsley, S. Molinari, S. Carey and A. Noriega-Crespo A&A 470 (3) 977-989 (2007) DOI: 10.1051/0004-6361:20077583|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||03 Dec 2009 21:55|
|Last Modified:||26 Dec 2012 11:35|
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