Speaker
Grazina Tautvaisiene
(Vilnius University)
Description
Carbon and nitrogen abundances are among most useful quantitative indicators of mixing processes in evolved stars. Because of the first dredge-up abundances of 12^C decrease while abundances of 13^C and 14^N increase. These alterations become efficient again on the red giant branch when stars reach the so-called luminosity bump, and depend on stellar evolutionary stage, mass, metallicity, rotation, magnetic activity and other parameters and processes. An overview will be provided on observational analyses of evolved low mass giants accomplished using the Nordic Optical Telescope.
Primary author
Grazina Tautvaisiene
(Vilnius University)
