Other
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..493k&link_type=abstract
The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 493
Other
7
Stars: Formation, Stars: Luminosity Function, Stars: Pre-Main Sequence, Infrared: Stars
Scientific paper
We present the first results of a mid-infrared survey of the star formation region in the Serpens Cloud. In total, 0.22 square degrees were mapped with ISOCAM in the two broad band filters LW2 (5 - 8.5 μm) and LW3 (12 - 18 μm), and fluxes were obtained for 550 and 210 point sources in LW2 and LW3, respectively. The colour index [14.3/6.7] was used to obtain a robust sample of YSOs. Among the 191 sources detected in both filters, 81 are identified as YSOs, of which only 28 where known from before. A lower limit of 400 YSOs per pc2 is found for the densely clustered Cloud Core. The near-IR J-H/H-K diagram identifies only ~ 1/3 of the YSOs that are found by the single ISOCAM colour index [14.3/6.7]. We find that the Class I/Class II number ratio is large compared to other star formation regions, and this suggests that the Serpens Cloud contains an extremely young cluster. A preliminary luminosity function of the ISOCAM sample of Class II sources does not appear to turn over at the completeness limit of this survey.
Abergel Alain
Andre Pascal
Bontemps Sylvain
Boulanger Francois
Burgdorf Martin
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