2 Observations

The list of spectra applied in this article is given in Table 1. We used the Reticon spectra described by Horn et al. (1996) for each star in our list. The spectrograms were acquired at the coudé focus of the 2.0-m telescope of the Astronomical Institute of the Czech Academy of Sciences, Ondrejov. The reduction of these spectra was carried out by the program SPEFO, developed by Horn (Skoda 1996). For $\alpha$ Cas we employed the spectra fully described by ,Stefl (1985, 1994). The spectra were obtained with the 2.0-m telescope of the Astronomical Institute, Ondrejov. We also employed spectra from the Arcturus atlas (Wallace & Hinkle 1996). For $\alpha$ Ari, we utilized spectra from the library of high and mid-resolution spectra (Montes et al. 1997). Finally, for $\beta$ Gem and $\alpha$ Cas we acquired spectra at the observatory of Masaryk University at Kravíhora, Brno by the CCD Jobin Yvon spectrometer (with 1200 gr/mm blazed grating) attached to the 0.6 m telescope.

 

Table 1: Observation applied in this article