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Reddening in the Narrow-Line Region of Active Galactic Nuclei

Published online by Cambridge University Press:  07 August 2017

I.M. Yancoulova  and
Z.I. Tsvetanov
I.M. Yancoulova
Affiliation:
Dept. Astronomy, University of Sofia, 5 Anton Ivanov Str., 1126 Sofia, Bulgaria
Z.I. Tsvetanov
Affiliation:
Dept. Astronomy, Bulgarian Acad. Sci., 72 Lenin Blvd., 1784 Sofia, Bulgaria ESO, Karl-Schwarzschild-Str. 2, D-8046 Garching bei München, FRG

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The best indicators of the reddening in the narrow-line regions of AGN are ratios of pairs of forbidden lines arising from a common upper level. The ratios of [SII] λ4072/λ10320 and [OII] λ7325/λ2470 are good examples, but they include lines in the far ultraviolet and infrared regions which are difficult to observe.

Type
Part 5: Structure of the Central Object and NLR
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 329 - 330
Copyright
Copyright © Kluwer 1989 

References

Allen, D.A., 1979. Mon. Not. R. astr. Soc., 186, 1P.Google Scholar
Malkan, M.A., 1983. Astrophys. J., 264, L1.Google Scholar