The Primordial Helium Abundance
Manuel Peimbert
TL;DR
This paper reviews methods for determining the primordial helium abundance, highlighting its significance in cosmology, big bang nucleosynthesis, and stellar evolution, and discusses its implications for understanding the early universe.
Contribution
It provides a concise overview of the current techniques and importance of measuring the primordial helium abundance in various astrophysical contexts.
Findings
Primordial helium abundance is crucial for testing big bang models.
Accurate Yp measurements inform stellar evolution initial conditions.
Helium abundance impacts models of galactic chemical evolution.
Abstract
I present a brief review on the determination of the primordial helium abundance by unit mass, Yp. I discuss the importance of the primordial helium abundance in: (a) cosmology, (b) testing the standard big bang nucleosynthesis, (c) studying the physical conditions in H II regions, (d) providing the initial conditions for stellar evolution models, and (e) testing the galactic chemical evolution models.
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Taxonomy
TopicsCosmology and Gravitation Theories · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research