Example of a galaxy with a significant broad Hα component: GDS-13704 at z = 5.93. The black line shows the observed spectrum. The blue line represents the best-fit model using a double Gaussian profile. The red line shows the narrow component, while the green line corresponds to the broad component. The x axis shows the rest-frame wavelength in Angstroms, and the y axis shows the flux density in units of 10⁻²¹ erg s⁻¹ cm⁻² Å⁻¹. This source has a ΔBIC = 34.5, providing strong evidence for the presence of broad-line emission.