A study of the Chamaeleon I dark cloud and T-association. V - Luminosity function for members

Details A study of the Chamaeleon I dark cloud and T-association. V - Luminosity function for members A study of the Chamaeleon I dark cloud and T-association. V - Luminosity function for members

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.254..361p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 254, Jan. 15, 1992, p. 361-368. Research supported by A

Astronomy and Astrophysics

Astronomy

49

Dark Matter, Infrared Photometry, Molecular Clouds, Star Formation, Stellar Luminosity, Infrared Astronomy Satellite, Spectral Energy Distribution, T Tauri Stars

Scientific paper

A list was compiled of 81 probable members in the Chamaeleon I star forming region. New ground-based infrared photometry is presented, and infrared spectral energy distributions (SEDs) are constructed by combining ground-based and IRAS data. Classification based on the spectral slope of the spectral slope of the SEDs between 2.2 and 25 microns indicates that Chamaeleon I is on the average in a later stage of evolution than the Rho Ophiuchi cluster. Having extended the SEDs to shorter wavelengths by including results from optical photometry published in the literature, bolometric luminosities for 62 objects were deduced. The resulting luminosity function (LF) of Chamaeleon I is very similar to that of Taurus. The segregation between embedded and visible objects observed in the LF of the Rho Ophiuchi cluster could not be detected. In order to gain a qualitative understanding of this difference, a scenario is proposed in which the most massive subregions of clumpy molecular clouds start producing stars before the smaller ones.

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