Observations of young stars in the association Chamaeleon T1

Details Observations of young stars in the association Chamaeleon T1 Observations of young stars in the association Chamaeleon T1

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..444r&link_type=abstract

Astronomical Journal, vol. 85, Apr. 1980, p. 444-450.

Astronomy and Astrophysics

Astronomy

65

B Stars, Electrophotometry, Stellar Spectrophotometry, T Tauri Stars, Ubv Spectra, Astronomical Spectroscopy, Stellar Envelopes, Stellar Evolution, Stellar Magnitude, Vidicons

Scientific paper

BVRI photoelectric photometry is presented for 34 likely members of Cha T1 along with spectroscopic observations of 25 of these stars. A distance of 140 pc is derived from uvby beta photometry of the two embedded B-type stars. In the (V, V-I) diagram, the late-type association members form a well defined band which is one to two magnitudes above the main sequence. The color excesses of the stars with known spectral types seem consistent with the circumstellar dust shell model for the infrared excess. A cloud mass of 670 solar masses is estimated from star counts; this implies a star formation efficiency of about eight percent.

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