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W1636390802 abstract "We present a series of CCD spectra of the very active T Tauri star DR Tau. The amount of veiling of the stellar absorption lines was unusually large and highly variable on timescales as short as a few hours. Inverse P Cygni profiles are visible over a wide range of line excitation: Na I D, Fe II, Hβ, and even He I λ5867. The equivalent widths of the emission and the inverse P Cygni absorption lines are 2 to 10 times larger in the high veiling state. However, the velocity structure of the inverse P Cygni lines is not affected by changes in the amount of veiling" @default.
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W1636390802 date "1993-02-01" @default.
W1636390802 modified "2023-09-23" @default.
W1636390802 title "The spectral variability of DR Tauri." @default.
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