Photoelectric UBV-photometry of the young star In(YY)-type DR Tauri in 1982-1986

Astronomy and Astrophysics – Astronomy

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Binary Stars, Electrophotometry, Stellar Evolution, Stellar Luminosity, Stellar Spectrophotometry, Ubv Spectra, Periodic Variations, Radiant Flux Density, Stellar Activity, Stellar Atmospheres, Stellar Color, Temperature Distribution

Scientific paper

Photoelectric UBV photometry data (obtained during 1982-1986) are presented for the variable star DR Tau which experienced a novalike brightness increase during 1965-1980. Flares with a duration of several days and highly unusual minima are found in the postmaximum period of stellar activity. The color-brightness relationships are as follows: the greater the brightness, the bluer the B-V color and the redder the U-B color. The observed variability of DR Tau is in agreement with a model describing the activity of young stars (Grinin, 1980) in which it is proposed that the appearance of hot spots in the stellar atmosphere is due to gas accretion.

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