Program: GS-2017A-Q-71

Title:A GMOS survey of CEMP stars
PI:Lorenzo Monaco
Co-I(s):

Abstract

In the early Galaxy, the stellar population was dominated by carbon enhanced metal-poor (CEMP) stars, that were formed from a carbon enhanced gas. In addition, there is a population of polluted stars that acquired their enhancement in carbon and heavy elements from an asymptotic giant branch (AGB) companion. The two populations can be distinguished from their different carbon abundance, A(C) and also from the enhancement in heavy elements. The statistics in the extremely metal-poor regime is scanty. We propose a small survey, that can be executed as a filler program, to observe a sample of extremely metal-poor CEMP candidates to derive a precise carbon abundance and a useful detection/upper-limit of Sr and Ba. This will significantly increase the statistics of the two populations and allow to understand the heavy-elements contents in the two populations.

Publications using this program's data