9 papers · 1 filter
A HST study of the environment of the Herbig Ae/Be star LkHa 233 and its bipolar jet
Stanislav Yu. Melnikov, Jens Woitas, Jochen Eislöffel +3
We present the results of HST/STIS and WFPC2 observations of LkHa 233 and its environment. LkHa233 is a Herbig Ae/Be star with a collimated bipolar jet. We investigate optical forb…
The young, active binary star EK Draconis
B. König, E. W. Guenther, J. Woitas +1
EK Dra (HD 129333) is a young, active, nearby star that is orbited by a low mass companion. By combining new speckle observations with old and new radial velocity measurements we f…
Jet rotation: launching region, angular momentum balance and magnetic properties in the bipolar outflow from RW Aur
Jens Woitas, Francesca Bacciotti, Thomas P. Ray +3
Using STIS on board the HST we have obtained a spectroscopic map of the bipolar jet from RW Aur. We find signatures of rotation within the first 300 AU of the jet (1.''5 from RW Au…
Rotation of Jets from Young Stars: New Clues from the Hubble Space Telescope Imaging Spectrograph
Deirdre Coffey, Francesca Bacciotti, Jens Woitas +2
We report findings from the first set of data in a current survey to establish conclusively whether jets from young stars rotate. We observed the bi-polar jets from the T Tauri sta…
A fourth component in the young multiple system V 773 Tau
Jens Woitas
I report on a new component in the pre-main sequence multiple system V 773 Tauri. This second visual companion, V 773 Tau C, with a projected separation of about 0."2 has been dete…
Visual orbit for the low-mass binary Gliese 22 AC from speckle interferometry
J. Woitas, V. S. Tamazian, J. A. Docobo +1
Based on 14 data points obtained with near-infrared speckle interferometry and covering an almost entire revolution, we present a first visual orbit for the low-mass binary system…