학술논문
On the influence of multiple stellar populations in globular clusters on their medium-resolution integrated-light spectra
Document Type
Working Paper
Author
Source
Subject
Language
Abstract
We take a closer look at our published results of determination of ages, metallicities, helium mass fractions and abundances of chemical elements in Galactic globular clusters in order to find possible signatures of the phenomenon of multiple stellar populations in these data. Our analysis reveals that carbon abundances in the atmospheres of stars in the studied clusters change gradually during their evolution. The changes of the helium mass fraction and C, O, Mg and Na abundance anomalies caused by the effect of multiple stellar populations on the analyzed integrated-light spectra are detected through the comparison of our results with models of chemical evolution and literature data for Galactic field stars.
Comment: 4 pages, 2 tables, to be published in the proceedings of the conference 'Ground-Based Astronomy in Russia. 21st Century', Nizhnii Arkhyz, Russia, 21-25 Sep 2020
Comment: 4 pages, 2 tables, to be published in the proceedings of the conference 'Ground-Based Astronomy in Russia. 21st Century', Nizhnii Arkhyz, Russia, 21-25 Sep 2020