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Paper: ISOCAM Survey of Nearby Star Formation Regions
Volume: 132, Star Formation with the Infrared Space Observatory (ISO)
Page: 127
Authors: Nordh, L.; Olofsson, G.; Bontemps, S.; Huldtgren, M.; Kaas, A. A.; Andre, P.; Cesarsky, C. J.; Montmerle, T.; Abergel, A.; Boulanger, F.; Cesarsky, D.; Lagache, G.; Puget, J. L.; Blommaert, J.; Burgdorf, M.; Prusti, T.; Copet, E.; Davies, J.; Falgarone, E.; Perault, M.; Persi, P.; Sibille, F.
Abstract: An overview and summary are given of preliminary results derived from a photometric ISOCAM survey of four nearby star-forming regions in Chamaeleon, Ophiuchus, Serpens and Corona Australis. The total area observed is 2.3 square degrees. The number of objects detected at 6.8 microns (LW2) and 15 microns (LW3) is 1373 and 525, respectively. Almost all 15 microns objects are also detected at 6.8 microns. The colour index [LW3/LW2] distinguishes two groupings of objects, one with normal photospheric colours and one with significantly redder colours. The latter group of stars is suggested to represent embedded objects, which results in more than a doubling of the number of known embedded, young stars in the studied star-forming regions. The derived luminosity functions extend to luminosities almost a factor 100 lower than in previous studies and are most likely limited by incompleteness. A preliminary mass function derived for the embedded stars in Chamaeleon I is remarkably flat and suggests that there is a significant number of brown dwarf candidates.
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