PREDNASAJUCI / LECTURER :

Lubomir Hambalek

NAZOV / TITLE :

Spectroscopical study of selected T Tauri stars

ABSTRAKT / ABSTRACT :

We present results from the long-term spectroscopic monitoring of 22 T Tauri
stars located in the Taurus-Auriga star-forming region (SFR). The medium and
high-dispersion Échelle spectroscopy from Stará Lesná, Skalnaté Pleso,
Tautenburg Observatory (Germany), and INAF Astronomical Observatory of Padova
in Asiago (Italy) was obtained between 2015 – 2018. The broadening function
technique was used to determine the radial and projected rotational velocities
and to study possible multiplicity of objects. The analysis was also focused on
the determination of atmospheric parameters such as log g, Teff, and [Fe/H].
We have investigated the effect of possible reddening on individual targets.
The nature of the objects was assessed by measuring the equivalent width of Hα
and Li I lines. Their membership to the SFR was checked using the Gaia DR3
parallaxes and estimated model distances. Evolutionary status of all selected
stars is also discussed.