Distribution of intrinsic FWHM widths (i.e., deconvolved from instrumental broadening) for CEERS galaxies selected at 1 < z < 3 as described in the text. The FWHM is estimated from the Hα line. If Hα is not detected, we use the highest S/N line in the spectrum, that is, [S III] λ9530 Å or [O III] λ5007 Å. The line width is a variable parameter in the fit but is assumed to be the same value for all narrow lines, with a tolerance of 50 km s⁻¹. The median value of the sample (FWHM_median ≃ 175 km s⁻¹) is represented with a vertical dashed black line.