2004BaltA..13..533W

We report on observations of jets from T Tauri stars with the STIS spectrograph on board of the Hubble Space Telescope (HST). Observations of this kind can resolve structures to within 10-20 AU from the source and thus open the best observational window to the initial generation of jets that is available today. In particular, we can search for indications of rotation in the initial jet channel. This phenomenon is predicted by most theoretical approaches concerning jet formation. We do indeed find indications of rotation in the jets from DG Tau, RW Aur, TH28 and LkHα 321. In the cases of bipolar jets, both lobes rotate in the same direction.