Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 1K023

Physical properties of the DG Tau jet on sub-arcsecond scales with HST/STIS

Bacciotti, Francesca (INAF - Osservatorio Astrofisico di Arcetri )
Maurri, Lorenzo (Universita\' di Firenze)
Podio, Linda (UJF-IPAG Grenoble)
Eisloeffel, Jochen (TLS Tautenburg)
Ray, Tom (Dublin Institute for Advanced Studies )
Mundt , Reinhard (MPIA Heidelberg)
Locatelli, Ugo (Universita\' di Roma Tor Vergata)
Coffey, Deirdre (University College Dublin )

Stellar jets are believed to play a key role in the formation of a new star, but the question of how they originate is still under debate. To get a better understanding of the launch process we derive the physical properties at the base of the blue-shifted jet from the Classical T Tauri star (CTTS) DG TAU, from spectra taken with the Hubble Space Telescope Imaging Spectrograph (HST/STIS) at optical wavelengths. The analysis provides information on the jet physics (kinematics, density, excitation) at 0.\'\'1 angular resolution in two dimensions (along and across the jet), and as a function of velocity. Mass outflow and angular momentum rates can be estimated for different velocity components, giving indications on the validity of the proposed models for the jet generation.

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