Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98.1088h&link_type=abstract
(Astronomical Society of the Pacific, Symposium on Starbursts and Very Young Stars, University of Colorado, Boulder, July 1986)
Physics
39
Astronomical Photometry, Stellar Physics, T Tauri Stars, Variable Stars, Brightness, Light Curve, Photosphere, Radii, Stellar Color
Scientific paper
A review is given of the variability characteristics of T Tauri stars monitored at Van Vleck Observatory. A list of T Tauri stars with known rotation periods is compiled and used to compare limits on the radii, derived from v sin i measures, with expectation based on the luminosities and effective temperatures of the stars. The large-amplitude quasi-perodic or aperiodic component of the light variation, which is more typical of the T Tauri phenomenon than periodic behavior, is discussed. Correlations between brightness and color and brightness and spectral change are reviewed. A typical time scale of 30 to 60 days is suggested for the phenomenon in the Van Vleck Observatory sample. A plausible interpretation of the variability is given, which involves the growth and decay of active regions on the photosphere of the star.
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