On the radial distribution of stars of different stellar generations in the globular cluster NGC 3201

Eugenio Carretta, Angela Bragaglia, Valentina D'Orazi, Sara Lucatello, Raffaele Gratton

Published 2010-06-30Version 1

We study the radial distribution of stars of different stellar generations in the globular cluster NGC 3201. From recently published multicolour photometry, a radial dependence of the location of stars on the giant branch was found. We coupled the photometric information to our sample of 100 red giants with Na, O abundances and known classification as first or second-generation stars. We find that giants stars of the second generation in NGC 3201 show a tendency to be more centrally concentrated than stars of the first generation, supporting less robust results from our spectroscopic analysis.