124 citations · 292 across the 5 of their papers we have counts for
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astro-ph2007★ 26 cited
Decoding the spectra of SDSS early-type galaxies: New indicators of age and recent star formation
Ben Rogers, Ignacio Ferreras, Ofer Lahav +3
(Abridged) We apply Principal Component Analysis (PCA) to a sample of early-type galaxies from the Sloan Digital Sky Survey (SDSS) in order to infer differences in their star forma…
astro-ph2007★ 119 cited
The Helium abundance and Delta Y / Delta Z in Lower Main Sequence stars
Luca Casagrande, Chris Flynn, Laura Portinari +2
We use nearby K dwarf stars to measure the helium-to-metal enrichment ratio, a diagnostic of the chemical history of the Solar Neighbourhood. Our sample of K dwarfs has homogeneous…