Abundance analysis of extremely metal-poor stars

摘要

Abstract. The outer atmosphere of the first generations of low-mass (M 0.8 M ) stars retain to a great extent the original chemical composition of the interstellar medium (ISM) at the time and place of their birth. The composition of this pristine gas represents the nucleosynthesis of the very first massive stars, that produced and ejected the first heavy elements into the early ISM. Thus a detailed abundance analysis of low-mass, metal-poor stars can help us track these gasses and provide insi.