The spectral variability of TW Hya, a 10 Myr old classical T Tauri star
Silvia Alencar & Celso Batalha

Institute: Astronomy Department - IAG - University of Sao Paulo, Brasil
Contact Email: alencar@iagusp.usp.br

Abstract: We present the analysis of 50 spectra of the Classical T Tauri star TW Hya observed with the FEROS echelle spectrograph over the last two years. The star exhibits strong emission lines that show a variety and variability in profile shapes. The system shows periodic variations in line and veiling intensities that are consistent with magnetospheric accretion models with an inclined dipole field. Our results suggest the system is viewed at low inclinations ( i < 20 degrees ).

No manuscript was submitted to these Proceedings.

This work is published in Variability of Southern T Tauri Stars. II. The Spectral Variability of the Classical T Tauri Star TW Hydrae by Silvia H. P. Alencar & Celso Batalha 2002, ApJ, 571, 378.

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