159 citations · 574 across the 21 of their papers we have counts for
21 papers
Astronomical technology - the past and the future
Immo Appenzeller
The past fifty years have been an epoch of impressive progress in the field of astronomical technology. Practically all the technical tools, which we use today, have been developed…
Inclination effects in T Tauri star spectra
Immo Appenzeller, Claude Bertout
CONTEXT. Because of the presence of rotation and accretion disks, classical T Tauri stars have symmetry planes that are normally inclined relative to the plane of the sky. The incl…
Lyman alpha emission in high-redshift galaxies
C. Tapken, I. Appenzeller, S. Noll +4
A significant fraction of the high-redshift galaxies show strong Lyman emission lines. For redshifts z>5, most known galaxies belong to this class. However, so far not much is know…
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…
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…
The evolution of the luminosity functions in the FORS Deep Field from low to high redshift: I. The blue bands
A. Gabasch, R. Bender, S. Seitz +13
We use the very deep and homogeneous I-band selected dataset of the FORS Deep Field (FDF) to trace the evolution of the luminosity function over the redshift range 0.5 < z < 5.0. W…