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The presence of double-peaked/multicomponent emission line profiles inspectra of galaxies is commonly done by visual inspection. However, theidentification of complex emission line profiles by eye is unapproachable forlarge databases such as the Sloan Digital Sky Survey (SDSS) or the integralfield spectroscopy surveys of galaxies (e.g. CALIFA or MaNGA). We describe aquick method involving the cross-correlation technique for detecting thepresence of complex (double-peaked or multiple components) profiles in thespectra of galaxies, deriving simultaneously a first estimation of the velocitydispersions and radial velocities of the dominant gaseous component. Weillustrate the proposed procedure with the well-known complex [OIII]4959,5007profiles of the central region of NGC1068.

Searching double-peaked emission line profiles in the spectra of galaxies through the symmetry of the cross-correlation function