Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..680h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 104, no. 2, Aug. 1992, p. 680-690. Research supported by NSF.
Astronomy and Astrophysics
Astronomy
62
Astrometry, Distance, Hertzsprung-Russell Diagram, Molecular Clouds, Stellar Spectrophotometry, T Tauri Stars, Dark Matter, Emission Spectra, H Alpha Line, Interstellar Extinction, Spectral Line Width, Stellar Color
Scientific paper
Photometric and spectroscopic observations of the classical T Tauri stars in the Chamaeleon II dark cloud are presented. The distance to Cha II is 200 +/- 20 pc, based on a plot of extinction versus distance for field stars seen against the cloud. The ages of the premain-sequence stars in Cha II range between 10 exp 5 and 10 exp 7 yr. The stellar population of the Cha II cloud consists mostly of low mass stars - at least 17 of the 19 known T Tauri stars in Cha II have masses less than 1 solar mass. The only intermediate mass star in the cloud is IRAS 12496-7650, a highly embedded Herbig Ae star. The mass function of Cha II resembles that of the Lupus complex, and there are a larger fraction of low mass stars in Cha II than there are in the Taurus-Auriga region.
Hartigan Patrick
Hughes Joanne
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