Mission
Astroserver is a private, community supported non-profit organization with affordable solutions in research astronomy. The team offers expertise mainly in stellar astrophysics, spectroscopy, non-LTE model atmosphere calculations, assistance with publications and media content production, and help with service observations. These services are similar to the tasks of post-doctoral and graduate researchers. Therefore, our activity can be integrated into the programme of graduate schools and research institutes. To wrap-up: Astroserver is your "occasional post-doc".
The main goal of the Astroserver Team is to provide precise and reliable measurements of stellar atmospheric parameters in a consistent way across the Hertzsprung-Russell Diagram and make it accessible to everyone. The accuracy of these solutions depends on the choice of the model, the quality of input atomic data and observations. Therefore, our Team continuously improves the models and revise the atomic data input by analyzing high quality observations of standard objects. Beyond the main mission the Team is also keen on finding solutions to challenging problems on the frontiers of applied stellar spectroscopy.
Interested researchers: Please consider our services in the budget plan of your grant applications! Upon request we contribute to such proposals free of charge.
Feel free to contact us for more information!
- 2020
TESS observations of the interesting pulsating subdwarf B star CD-28° 1974
From TESS observations we have discovered CD-28° 1974 to be a pulsating subdwarf B star which has an unusual gravity(g)-mode asymptotic sequence indicating that CD-28° 1974’s structure is somewhat different from typical sdBV stars.
- 2017
Atomic diffusion in the atmosphere of Feige 86
A re-analysis of the ultraviolet and optical spectra of Feige 86 found large abundances of xenon in its atmosphere. The star shows a rich, sharp-lined peculiar spectrum both in the ultraviolet and the optical, which marks active atomic diffusion processes.
- 2016
PB 3877: A new hypervelocity binary
A team of astronomers at the Friedrich Alexander University, Erlangen-Nürnberg (FAU, Germany) in collaboration with researchers from the California Institute of Technology (Caltech, USA), has discovered a binary star (PB 3877) that is moving nearly at the escape velocity of our Galaxy.
- 2017
Composite hot subdwarf binaries from UVES
Hot subdwarf-B (sdB) stars in long-period binaries are found to be on eccentric orbits, even though current binary-evolution theory predicts these objects to be circularised before the onset of Roche-lobe overflow (RLOF). To increase our understanding of binary interaction processes during the RLOF phase, we started a long term observing campain to study wide sdB binaries.
