Primordial Helium Abundance Determination Through an Alternative Method

FERNÁNDEZ, V. G.; TERLEVICH, E.; ROSALES-ORTEGA, F.; TERLEVICH, R.; DIAZ, A. I.; HÄGELE, G. F.

Puebla

Congreso; Guillermo Haro: Massive Young Star Clusters Near and Far: From the Milky Way to Reionization; 2013

INAOE

The primordial light elements concentration is a keystone in the Big Bang Cosmology.Among these elements, the initial helium mass fraction, YP, is the most readily accessible. According to the standard model, the ratio between baryons and photons, h, circumscribes the universe composition and physical conditions during the primordial nucleosynthesis. The main novelty in this study consists in attempting this scheme with Sulphur. This element shares the chemical evolution of Oxygen, and hence, it could be equally valid for this purpose. Furthermore, the Sulphur abundance can be derived efficiently up to solar values (Hagele et al. 2008). It is expected to extend the trendline and reduce the dependency on most metal poor objects.