SIMBAD references

2015MNRAS.453.4102D - Mon. Not. R. Astron. Soc., 453, 4102-4111 (2015/November-2)

On the central abundances of active galactic nuclei and star-forming galaxies.

DORS O.L.Jr, CARDACI M.V., HAGELE G.F., RODRIGUES I., GREBEL E.K., PILYUGIN L.S., FREITAS-LEMES P. and KRABBE A.C.

Abstract (from CDS):

We examine the relation between oxygen abundances in the narrow-line regions (NLRs) of active galactic nuclei (AGNs) estimated from the optical emission lines through the strong-line method, via the direct Te-method, and the central intersect abundances in the host galaxies determined from the radial abundance gradients. We found that the Te-method underestimates the oxygen abundances by up to ∼ 2 dex (with averaged value of ∼ 0.8 dex) compared to the abundances derived through the strong-line method. This confirms the existence of the so-called `temperature problem' in AGNs. We also found that the abundances in the centres of galaxies obtained from their spectra trough the strong-line method are close to or slightly lower than the central intersect abundances estimated from the radial abundance gradient both in AGNs and star-forming galaxies. The oxygen abundance of the NLR is usually lower than the maximum attainable abundance in galaxies ( ∼ 2 times the solar value). This suggests that there is no extraordinary chemical enrichment of the NLRs of AGNs.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: formation - galaxies: general - galaxies: ISM

CDS comments: In tables Mrk 226SW is a misprint for Mrk 266SW.

Simbad objects: 88

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2020.10.25-07:39:23

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