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Abstract: We have used the diagnostic diagram that compares the ratio of emission linesNII\lambda6584-H\alpha with the equivalent width of NII$\lambda$6584, asproposed by Coziol et al. 1998, to determine the source of ionization of SDSSNELGs that cannot be classified by standard diagnostic diagrams, because theemission line OIII$\lambda$5007, H\beta, or both, are missing. We find thesegalaxies to be consistent with low luminosity AGNs, suggesting that thischaracteristic is the signature of the LLAGNs in the nearby Universe.



Autor: D.M. Neri-Larios, J.P. Torres-Papaqui, R. Coziol, J.M. Islas-Islas, R.A. Ortega-Minakata

Fuente: https://arxiv.org/







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