A study of the Chamaeleon dark cloud complex - Survey, structure and embedded sources

Details A study of the Chamaeleon dark cloud complex - Survey, structure and embedded sources A study of the Chamaeleon dark cloud complex - Survey, structure and embedded sources

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.201.1095h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 201, Dec. 1982, p. 1095-1117.

Astronomy and Astrophysics

Astronomy

84

Astronomical Spectroscopy, Infrared Astronomy, Interstellar Matter, Nebulae, Stellar Evolution, Density Distribution, Interstellar Extinction, Luminosity, Main Sequence Stars, Spatial Distribution, Star Distribution, Stellar Envelopes, Stellar Models

Scientific paper

IR (JHK) photometry of CVF spectrophotometry of the sources found in a 2-micron survey of a significant portion of the Chamaeleon dark cloud has detected, through discrimination between background field stars and cloud members, an increase in the number of pre-main sequence (PMS) members, over that found optically, by more than 50%. This corresponds to a star formation efficiency of about 12% over the whole cloud, and similarly large numbers of hidden PMS objects are probably also present in other cloud regions. The density structure of the cloud, derived from the reddening of background field stars, shows that small scale clustering of small groups of PMS members occur preferentially near steep density gradients in the cloud. Dust shell models for reasonable optical depths suggest that the observation of IR radiation from T Tauri objects is due to some noncontinuous form of the shell density distribution.

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