Abundance analysis of extremely metal-poor stars

6th Nuclear Physics in Astrophysics

物理学;天文学

Hansen, T.^1 ; Hansen, C.J.^1 ; Christlieb, N.^1 ; Andersen, J.^2

Landessternwarte, Heidelberg University, Germany^1

Niels Bohr Institute, University of Copenhagen, Denmark^2

关键词: Abundance analysis;    Chemical compositions;    Formation process;    Heavy elements;    Interstellar mediums;    Massive stars;    Metal-poor star;    Neutron-capture process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012012/pdf
DOI  :  10.1088/1742-6596/665/1/012012

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The outer atmosphere of the first generations of low-mass (M o) 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 insight into the formation processes that took place in the very early stages of our Galaxy. Preliminary result of a 25-star homogeneously analysed sample of metal- poor candidates from the Hamburg/ESO survey is presented. The main focus is on the most metal-poor stars of the sample; stars with [Fe/H]