The NIRVANDELS Survey: a robust detection of $\alpha$-enhancement in star-forming galaxies at $z\simeq 3.4$

F. Cullen, A. E. Shapley, R. J. McLure +25

We present results from the NIRVANDELS survey investigating the gas-phase metallicity (${\mathrm{Z}}_{\mathrm{gas}}$, tracing O/H) and stellar metallicity ($Z_{\star }$, tracing Fe/H)…