| Abstract [eng] |
We investigated connections between the chemical and kinematical properties of stars in the Galactic globular cluster 47 Tucanae (47 Tuc). For this, we used new measurements of the light element Na, Mg, K and s-process element Zn abundances in the atmospheres of red giant branch (RGB) and main sequence turn-off (TO) stars in 47 Tuc. The obtained results suggest the existence of mild cosmic spread in the abundances of Na and Mg, both in the RGB and TO stars: 0.04 ±0.05 and 0.08 ±0.02 (RGB), and 0.12 ±0.01 and 0.10 ±0.01 (TO), respectively. No cosmic spread has been determined in the case of K: 0.00 ±0.05 and 0.00 ±0.03, correspondingly in the RGB and TO stars. The mean abundance of K determined in this globular cluster is very similar to that of Galactic field stars at similar metallicity. We did not detect statistically significant relations neither between the abundance of K and those of light elements, nor between the abundances of light elements and kinematical properties of individual stars. All these results suggest that the nucleosynthesis of K and that of light chemical elements in this globular cluster has proceeded along different pathways and, thus, has taken place in different types of stars. |
