The MOSDEF Survey: Broad Emission Lines at z=1.4-3.8

Understand

We present results from the MOSFIRE Deep Evolution Field (MOSDEF) survey on broad flux from the nebular emission lines H$\alpha$, [NII], [OIII], H$\beta$, and [SII].

• The sample consists of 127 star-forming galaxies at $1.37 < z < 2.61$ and 84 galaxies at $2.95 < z < 3.80$.
• We decompose the emission lines using narrow ($\text{FWHM} < 275 \ \text{km s}^{-1}$) and broad ($\text{FWHM} > 300 \ \text{km s}^{-1}$) Gaussian components for individual galaxies and stacks.
• Broad emission is detected at $>3\sigma$ in $<10$% of galaxies and the broad flux accounts for 10-70% of the total flux.