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The main purpose of the investigation of the first three objects are a clarification of the models of their winds and an attempt to get the additional spectroscopic differences between the true hypergiants and theirs simulations by the low-mass stars. The clarification of the nature and the evolutinary state is the task of the investigation of the two last objects.
A seminar on spectroscopic and spectropolarimetric devices at the 6m telescope was presented on November, 15, 2001. Primary astrophysical results from the FSU team, based on the observational data obtained with the devices mentioned above, concerning post-AGB stars, A- and F-supergiants, and hypergiants were reported.
The FSU team visited the Catholic University of Valparaiso (Valparaiso, IN) aiming at a joint scientific discussion on proto-planetary nebulae with Prof. B. Hrivnak, a well-known researcher in this field. The FSU team's results on high resolution spectroscopy of such objects were presented there. These results are significant to understanding the processes of stellar nucleosynthesis and evolution of intermediate-mass stars after the main sequence phase.
During the visit, the FSU team was acquainted with spectral devices at the Ritter Observatory and software for 2-dimensional spectra processing. We have discussed advantages of the packages used for spectroscopic data reduction at the Ritter Observatory and at the Special Astrophysical Observatory.
We have also discussed a possibility to use new observational facilities at the 6m telescope to select new targets for follow up high resolution spectroscopy.