The LBT $Y_{\mathrm{p}}$ Project II: MODS Spectra, Physical Conditions, and Oxygen Abundances in Local Metal-Poor Nebulae

Noah S. J. Rogers, Evan D. Skillman, Richard W. Pogge +7

Empirically measuring the primordial He mass fraction, $Y_{\mathrm{p}}$, requires a significant number of low-metallicity nebulae with direct constraints on He/H and O/H abundances. Thi…