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Interstellar 12C/13C ratios through CH+ ll 3957,4232 absorption in local clouds: incomplete mixing in the ISM
S. Casassus, O. Stahl, T. L. Wilson
The 12C/13C isotope ratio is a tracer of stellar yields and the efficiency of mixing in the ISM. 12CH+/13CH+ is not affected by interstellar chemistry, and is the most secure way o…
SDSS J1553+0056: A BALQSO mimicking a Lyman-break galaxy
I. Appenzeller, O. Stahl, C. Tapken +2
Using the UVES echelle spectrograph at the ESO VLT we obtained high-resolution (R = 40 000) spectra of the object SDSS J1553+0056, which has been identified in the literature alter…
A spectroscopic event of eta Car viewed from different directions: The data and first results
Otmar Stahl, Kerstin Weis, Dominik J. Bomans +3
We present spectroscopic observations with high spectral resolution of eta Car as seen by the SE lobe of the Homunculus nebula over the 2003.5 "spectroscopic event". The observed s…
Edge-on T Tauri stars
Immo Appenzeller, Claude Bertout, Otmar Stahl
Using the UVES echelle spectrograph at the ESO VLT we obtained two-dimensional high-resolution (R = 50 000) spectra of the edge-on disk objects HH30*, HK Tau B, and HV Tau C. For c…