The H alpha line profile in two T Tauri stars - AA and DL Tau

Physics

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Absorption Spectra, H Alpha Line, Stellar Spectra, T Tauri Stars, Stellar Models, Time Dependence

Scientific paper

The paper presents medium resolution H alpha line profiles of two T Tauri stars - DL Tau (K 7 eV) and AA Tau (K 5 eV). Both stars reveal a central absorption, which is particularly clear and intense in the case of DL Tau, and in good agreement with the chromospheric hypothesis of Dumont et al., (1973). The technique used enables one to detect rapid time-variations of the line profile.

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