830 citations · 19.9k across the 288 of their papers we have counts for
Showing 1996 · astro-phShow all
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astro-ph1996★ 238 cited
The Primordial Abundance of He4: An Update
Keith A. Olive, Evan Skillman, Gary Steigman
We include new data in an updated analysis of helium in low metallicity extragalactic HII regions with the goal of deriving the primordial abundance of He4 (Y_P). We show that the…
astro-ph1996★ 72 cited
High Carbon in I Zwicky 18: New Results from Hubble Space Telescope Spectroscopy
D. R. Garnett, E. D. Skillman, R. J. Dufour +1
We present new measurements of the gas-phase C/O abundance ratio in both the NW and SE components of the extremely metal-poor dwarf irregular galaxy I Zw 18, based on ultraviolet s…