Abstract

CARDONA, Giovanni  and  PORTILLA, José Gregorio. Líneas prohibidas de alta ionización en una muestra de cuásares. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2015, vol.39, n.152, pp.321-327. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.224.

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.

Keywords : Quasar; coronal lines; photoionization code.

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