Publications (26)
Upgrading the GRAVITY fringe tracker for GRAVITY+: Tracking the white light fringe in the non-observable Optical Path Length state-space
M. Nowak, S. Lacour, R. Abuter +35
Aims. As part of the ongoing GRAVITY+ upgrade of the Very Large Telescope Interferometer infrastructure, we aim to improve the performance of the GRAVITY Fringe-Tracker, and to ena…
The narrow, inner CO ring around the magnetic Herbig Ae star, HD 101412
C. R. Cowley, S. Hubrig, F. Castelli +1
We describe and model emission lines in the first overtone band of CO in the magnetic Herbig Ae star HD 101412. High-resolution CRIRES spectra reveal unusually sharp features which…
Beryllium abundances and star formation in the halo and in the thick disk
R. Smiljanic, L. Pasquini, P. Bonifacio +4
[abridged] Beryllium is a pure product of cosmic ray spallation. This implies a relatively simple evolution in time of the beryllium abundance and suggests its use as a time-like o…
Equilibrium abundances in hot DA white dwarfs as derived from self-consistent diffusion models I. Analysis of spectroscopic EUVE data
S. L. Schuh, S. Dreizler, B. Wolff
We present the first analysis of an EUV selected sample of hot DA white dwarfs using a new type of atmospheric models. These models take into account the interplay between gravitat…
The EUV spectrum of the unique bare stellar core H1504+65
K. Werner, B. Wolff
We performed a spectral analysis of the EUVE spectrum and ROSAT data of the unique object H1504+65, which is an extremely hot post-AGB star entering the white dwarf cooling sequenc…
Magnetic fields of Herbig Ae/Be stars
S. Hubrig, I. Ilyin, M. Schoeller +5
We report on the status of our spectropolarimetric studies of Herbig Ae/Be stars carried out during the last years. The magnetic field geometries of these stars, investigated with…