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A study of the stellar population in the Chamaeleon dark clouds
Gauvin, Lisa S.; Strom, Karen M.
AA(Massachusetts, University, Amherst), AB(Massachusetts, University, Amherst)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 385, Jan. 20, 1992, p. 217-231. Research supported by NASA. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Molecular Clouds, Open Clusters, Pre-Main Sequence Stars, Star Formation, Stellar Coronas, X Ray Stars, Herbig-Haro Objects, Infrared Astronomy Satellite, Mass Distribution, Stellar Luminosity
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The properties of the stellar population in the Chamaeleon dark clouds are discussed. Spectral energy distributions, based on the extant photometric and spectroscopic data base and IRAS fluxes measured from coadded data taken at the position of each star, and spectral types allow placement of the stars in an H-R diagram. The age and mass distributions and the luminosity function for the Chamaeleon stars are compared to those in the Taurus-Auriga dark clouds and are found to be similar. A small subsample (eight of 36) of the Chamaeleon stars show unusual spectral energy distributions which seem best interpreted as arising from circumstellar disks whose inner regions (R(in)) is less than 30-50 stellar radii) area devoid of material. The X-ray properties of this sample of premain-sequence objects are compared to those of other premain-sequence samples, as well as to the Hyades and the Pleiades main-sequence stars.

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