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Analysis of HST and IUE Ultraviolet Spectra for T Tauri Stars: DF Tau

Vittone, A. A.; Errico, L.; Lamzin, S. A.

We analyze ultraviolet spectra of DF Tau, a binary system whose primary component is a classical T Tauri star. The spectra were obtained from the Hubble Space Telescope and the IUE satellite. The stellar emission in the wavelength range covered is shown to originate in an accretion shock wave. The gas infall velocity is 250 km/s. The accreted-gas …