Line profile variations in the classical T Tauri star DR Tau
Abstract
We present a time series analysis of quasi-simultaneous high resolution profiles of the H alpha, He I (lambda5876 AA) and Na I D lines for the active T Tauri star DR Tau. The data include repeated observations on time scales of one day. The star shows strong night-to-night variations in the equivalent widths and in the shape of the profile of H alpha. The variations of the line profile occur predominantly in the blue wing on time scales shorter than one day while the time scale for the equivalent width variability suggests a period of 4 to 5 days. Both the analysis of the normalized variance and the correlation matrix seem to indicate that the H alpha variability results from a transient blue-shifted absorption.
- Publication:
-
Herbig-Haro Flows and the Birth of Stars
- Pub Date:
- 1997
- Bibcode:
- 1997IAUS..182P.275G