EPJ Web of Conferences 19, 02009 (2012)
https://doi.org/10.1051/epjconf/20121902009

S-process in low-mass extremely metal-poor stars

¹ Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching bei München, Germany
² Instituto de Ciencias del Espacio (CSIC-IEEC), Facultad de Ciències, Campus UAB, 08193 Bellaterra, Spain

^a e-mail: mcruz@mpa-garching.mpg.de

Abstract

We present post-processing s-process calculations for the core He-flash of a 1M_☉ star with and Z = 10⁻⁸. Our model shows neutron densities larger than 10¹⁴cm⁻³, resulting in the production of s-process elements. The model reproduces the C, O, Sr, and Ba abundances of the star hyper metal-poor star HE0107-5240 within a factor of 4.