The Halpha, Hbeta and Hdelta lines in the spectrum RR Tauri

Abstract

The results of spectroscopic study of Ae Herbig star RR Tau are reported. The observations were carried out with a moderate resolution. In accordance with the presented data the Halpha line exhibits a double-peaked emission profile. The blue component is weaker than or equal to the red one. Variations of the Halpha equivalent width by a factor of 4 - 5 were found. The structure of this line also varies. On JD 2447148 a red absorption reversal of the Halpha profile was observed. The Hbeta spectral line exhibited both emission and absorption. On JD 2449664 the single-peak emission shifted to the short wavelength range of the underlying absorption line and the red wing of the stellar line looked like a red-shifted absorption component of medium strength. The Hdelta line was in absorption.