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Comparing AGN broad and narrow line regions

Published online by Cambridge University Press:  24 November 2004

Nicola Bennert ,
Heino Falcke ,
Yuri Shchekinov  and
Andrew S. Wilson
Nicola Bennert
Affiliation:
AIRUB, Universitätsstraße 150, 44780 Bochum, Germany
Heino Falcke
Affiliation:
ASTRON, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands
Yuri Shchekinov
Affiliation:
Rostov State University, Department of Physics, 344090 Rostov on Don, Russia
Andrew S. Wilson
Affiliation:
Astronomy Department, University of Maryland, College Park, MD 20742–2421, USA
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Abstract

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We compare recent HST observations of Seyfert and quasar NLRs and find that type–2 AGNs follow a relation consistent with that expected for a distribution of gas ionized by a central source $R_{\rm NLR,2} \propto L^{0.32 \pm 0.05}$, while type–1 objects are fit with a steeper slope of 0.55±0.05. The latter is comparable to the scaling found for the BLR size with continuum luminosity (slope: 0.5–0.7). Therefore, we investigate what we can learn about the BLR size if the NLR size is only determined by the AGN luminosity. We find that NLR and BLR size are related linearly following $R_{\rm BLR} \propto R_{\rm NLR,1}^{0.88 \pm 0.1}$. This relation can be used to estimate BH masses.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
POSTERS
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS222 , March 2004 , pp. 307 - 308
Copyright
© 2004 International Astronomical Union