Near-infrared images of the Serpens cloud core - The stellar cluster

Details Near-infrared images of the Serpens cloud core - The stellar cluster Near-infrared images of the Serpens cloud core - The stellar cluster

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...262..468e&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 262, no. 2, p. 468-482.

Astronomy and Astrophysics

Astronomy

101

Infrared Astronomy, Interstellar Matter, Molecular Clouds, Open Clusters, Pre-Main Sequence Stars, Image Analysis, Near Infrared Radiation, Star Clusters

Scientific paper

We present JHKnbL and 'ice' images of the Serpens molecular cloud core. A total of 163 stellar objects are detected, which represents an increase of about 140 objects with respect to the number of stars detected at wavelengths shorter than 1 micron. By using different criteria, 51 stars are identified as members of the Serpens young stellar cluster. The rest of the objects remain unidentified. They could be either background stars or additional embedded Serpens objects of very low luminosity. In a near-infrared color-magnitude diagram most of the identified Serpens stars are bright and red and seem to be reddened T Tauri-like stars. A turnover at K of about 13.5 mag in the K-distribution and also in the empirical luminosity function of the Serpens cluster occurs in the case that a significant part of the unidentified stars are indeed background stars. A lower limit of about 450/cu pc of the stellar density and a SFE in the range 8-28 percent are estimated. Finally, the infrared images reveal several new cometary nebulae embedded in the Serpens core.

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