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Physical Properties of the Extranuclear Emitting Regions in Irregular and Interacting AGNs
Published online by Cambridge University Press: 07 August 2017
Abstract
CCD slit spectra have been obtained at Lick Observatory of a sample of fourteen close interacting and irregular Seyfert galaxies. The spectra of the extranuclear emitting regions have been investigated and classified using the quantitative criteria recommended by Veilleux and Osterbrock to distinguish objects photoionized by thermal sources from objects photoionized by a “power law” continuum. From our data it results that four out of the twenty emitting regions identified are typical H II regions, while eight have spectra photoionized by a hard-photon spectrum. Seven regions show a twofold behavior which is interpreted in terms of a combination of photoionization, shock heating and scattering of light by dust.
- Type
- Part 8: Relationships of Nucleus, Galaxy and Environment
- Information
- Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 478 - 479
- Copyright
- Copyright © Kluwer 1989