Volume 518, July-August 2010
Herschel: the first science highlights
|Number of page(s)||6|
|Published online||16 July 2010|
Letter to the Editor
Initial highlights of the HOBYS key program, the Herschel imaging survey of OB young stellar objects *,**
Laboratoire AIM, CEA/IRFU – CNRS/INSU – Université Paris Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France e-mail: email@example.com
2 Laboratoire d'Astrophysique de Marseille, CNRS/INSU – Université de Provence, 13388 Marseille Cedex 13, France e-mail: firstname.lastname@example.org
3 Laboratoire d'Astrophysique de Bordeaux, CNRS/INSU – Université de Bordeaux, BP 89, 33271 Floirac cedex, France e-mail: email@example.com
4 National Research Council of Canada, Herzberg Institute of Astrophysics, University of Victoria, Department of Physics and Astronomy
5 Istituto di Fisica dello Spazio Interplanetario, INAF, via del Fosso del Cavaliere 100, 00133 Roma, Italy
6 School of Physics & Astronomy, Cardiff University, Queens Buildings The Parade, Cardiff CF24 3AA, UK
7 Herschel Science Centre, ESAC, ESA, PO Box 78, Villanueva de la Cañada, 28691 Madrid, Spain
8 Space Science and Technology Department, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, UK
9 Department of Physics & Astronomy, The Open University, Milton Keynes MK7 6AA, UK
10 IAS, Université Paris-Sud, 91435 Orsay, France
11 Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, Germany
12 CESR & UMR 5187 du CNRS/Université de Toulouse, BP 4346, 31028 Toulouse Cedex 4, France
13 IRAM, 300 rue de la Piscine, Domaine Universitaire, 38406 Saint Martin d'Hères, France
14 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, PR China
15 CITA & Dep. of Astronomy and Astrophysics, University of Toronto, Toronto, Canada
16 Department of Astronomy, Stockholm University, AlbaNova University Center, Roslagstullsbacken 21, 10691 Stockholm, Sweden
17 INAF-IASF, Sez. di Roma, via Fosso del Cavaliere 100, 00133 Roma, Italy
18 Institut d'Astrophysique de Paris, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014 Paris, France
19 UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill EH9 3HJ, UK
20 ESO, Karl Schwarzschild Str. 2, 85748, Garching, Germany
21 Dept. of Physics & Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
Accepted: 12 May 2010
We present the initial highlights of the HOBYS key program, which are based on Herschel images of the Rosette molecular complex and maps of the RCW120 H ii region. Using both SPIRE at 250/350/500 μm and PACS at 70/160 μm or 100/160 μm, the HOBYS survey provides an unbiased and complete census of intermediate- to high-mass young stellar objects, some of which are not detected by Spitzer. Key core properties, such as bolometric luminosity and mass (as derived from spectral energy distributions), are used to constrain their evolutionary stages. We identify a handful of high-mass prestellar cores and show that their lifetimes could be shorter in the Rosette molecular complex than in nearby low-mass star-forming regions. We also quantify the impact of expanding H ii regions on the star formation process acting in both Rosette and RCW 120.
Key words: stars: formation / stars: massive / telescopes / stars: protostars / H ii regions / dust, extinction
Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
Figures 4 and 5 are only available in electronic form at http://www.aanda.org
© ESO, 2010
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