492 citations
- W. Schmidt2 profiles80 · h 35
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18 papers · 1 filter
Carbon monoxide in the solar atmosphere II. Radiative cooling by CO lines
S. Wedemeyer-Böhm, M. Steffen
The role of carbon monoxide as a cooling agent for the thermal structure of the mid-photospheric to low-chromospheric layers of the solar atmosphere in internetwork regions is inve…
An asymmetry detected in the disk of Kappa CMa with the AMBER/VLTI
Anthony Meilland, Florentin Millour, Philippe Stee +7
Aims. We study the geometry and kinematics of the circumstellar environment of the Be star Kappa CMa in the Br gamma emission line and its nearby continuum. Methods. We use the VLT…
On the fine structure of the quiet solar \Ca II K atmosphere
Alexandra Tritschler, Wolfgang Schmidt, Han Uitenbroek +1
We investigate the morphological, dynamical, and evolutionary properties of the internetwork and network fine structure of the quiet sun at disk centre. The analysis is based on a…
Direct constraint on the distance of y2 Velorum from AMBER/VLTI observations
F. Millour, R. G. Petrov, O. Chesneau +95
In this work, we present the first AMBER observations, of the Wolf-Rayet and O (WR+O) star binary system y2 Velorum. The AMBER instrument was used with the telescopes UT2, UT3, and…
Dynamic Models of the Sun from the Convection Zone to the Chromosphere
Sven Wedemeyer-Böhm
The chromosphere in internetwork regions of the quiet Sun was regarded as a static and homogeneous layer for a long time. Thanks to advances in observations and numerical modelling…
Near-Infrared interferometry of Eta Carinae with high spatial and spectral resolution using the VLTI and the AMBER instrument
G. Weigelt
We present the first NIR spectro-interferometry of the LBV Eta Carinae. The K band observations were performed with the AMBER instrument of the ESO Very Large Telescope Interferome…