Kavli Affiliate: Anna Frebel
| First 5 Authors: Anna Frebel, , , ,
| Summary:
Ancient, long-lived stars remain present in all components of our home
galaxy, the Milky Way. Born a few hundred million after the Big Bang and during
a time that marked the very beginning of the chemical evolution, these stars
display very low abundances of elements heavier and hydrogen and helium, making
them "metal-poor". Studying the chemical composition of these stars reveals
direct information about the conditions of the early universe because each of
them has long preserved the local chemical signature of their individual birth
gas clouds in their stellar atmosphere. There are many different types of
metal-poor stars, each of them providing information on a different element
production history that occurred prior to their own births. Large samples of
metal-poor stars enable the reconstruction of nucleosynthesis and the chemical
evolution of our Galaxy, early star formation processes, and various aspects of
the assembly and evolution of the Milky Way.
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