Spatially Resolved Velocity Structures in Jets of DF Tau and UY Aur A
Abstract
Young stars accrete mass and angular momentum from their circumstellar disks. Some of them also drive outflows, which can be distinguished in optical forbidden emission lines. We analyze a sample of binary T Tauri stars observed with long-slit spectroscopy by the Hubble Space Telescope between 1998 and 2000, searching for spatially resolved outflows. We detect resolved [O I] emission in 2 cases out of 21. In DF Tau we resolve high- and medium-velocity outflows in a jet and counterjet out to 60 au. The outflows are accelerated within the inner 12 au and retain a constant speed thereafter. In UY Aur, we detect a blue- and a redshifted outflow from UY Aur A, as well as a blueshifted jet from UY Aur B. All of these features have been seen in [Fe II] with data taken 10 years apart indicating that the underlying outflow pattern is stable on these timescales.
- Publication:
-
The Astronomical Journal
- Pub Date:
- July 2020
- DOI:
- 10.3847/1538-3881/ab91a3
- arXiv:
- arXiv:2003.01179
- Bibcode:
- 2020AJ....160...39U
- Keywords:
-
- Circumstellar gas;
- Stellar jets;
- Star formation;
- Classical T Tauri stars;
- 238;
- 1607;
- 1569;
- 252;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 9 pages, 3 figures, submitted to AJ