Speaker
Levente Kriskovics
(Konkoly Observatory of the Hungarian Academy of Sciences, Budapest)
Description
Fast rotating red giant branch stars in the first dredge-up phase
provide a unique opportunity to study connections between
enhanced Li abundance and activity. DI Psc is (HD 217352) a Li-
rich, active single K giant, a new candidate for the rather small
group of giants currently in this state. We reconstructed the
surface temperature distribution by the means of Doppler
Imaging on several lines including Li I 6708 using exceptionally
high resolution and signal-to-noise spectra covering two
rotational periods. The surface differential rotational pattern was
recovered using cross correlation of the consecutive maps to
investigate if it is affected by the dredge-up mechanism.
Primary authors
Katalin Oláh
(Konkoly Observatory of the Hungarian Academy of Sciences, Budapest)
Krisztián Vida
(Konkoly Observatory of the Hungarian Academy of Sciences, Budapest)
Levente Kriskovics
(Konkoly Observatory of the Hungarian Academy of Sciences, Budapest)
Zsolt Kővári
(Konkoly Observatory of the Hungarian Academy of Sciences, Budapest)
