119 citations · 119 across the 1 of their papers we have counts for
2 papers
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…
astro-ph2004
Blue colours of BL Lac host galaxies
J. K. Kotilainen, R. Falomo
Near-infrared and optical imaging of BL Lac host galaxies is used to investigate their colour properties. We find that the R-H colour and colour gradient distributions of the BL La…