The age of the Universe from a large sample of the oldest Galactic stars
- View PDF HTML (experimental) Abstract:We estimate the age of the Universe using the Xiang & Rix sample of 247,103 Milky Way stars with high-resolution spectroscopy from LAMOST DR7 and $Gaia$ eDR3 parallaxes.
- Stellar ages were estimated using YY isochrones up to 20 Gyr.
- To remove stars with unusually high and precise ages, we require old stars to be metal-poor and $\alpha$-enriched.
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- View PDF HTML (experimental) Abstract:We estimate the age of the Universe using the Xiang & Rix sample of 247,103 Milky Way stars with high-resolution spectroscopy from LAMOST DR7 and $Gaia$ eDR3 parallaxes.
- Stellar ages were estimated using YY isochrones up to 20 Gyr.
- To remove stars with unusually high and precise ages, we require old stars to be metal-poor and $\alpha$-enriched.
Sources: Arxiv