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The simultaneous identification of the high ionization forbidden lines -{Fe VII}- l 6087 and -{Ne V}- l 3426 in spectra of quasars is the main interest of this paper. In order to obtain information of these lines we examined a sample of 1423 spectra of quasars obtained from the Sloan Digital Sky Servey (SDSS) utilizing a selection criteria for the redshift (0.14 ≤ z ≤ 0.2). We only detect 18 objects with the two lines of interest. With the fluxes of coronal lines and other forbidden lines we constructed a diagnostic diagram which allowed us to superimpose photoionization models carried out in CLOUDY in order to determine suitable physical conditions of the emission zone.

Líneas prohibidas de alta ionización en una muestra de cuásares