Testing the Unified Model with a Sample of Seyferts Selected by Isotropic Properties

Details Testing the Unified Model with a Sample of Seyferts Selected by Isotropic Properties Testing the Unified Model with a Sample of Seyferts Selected by Isotropic Properties

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.1112k&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #11.12; Bulletin of the American Astronomical Society, Vol. 34, p.1111

Astronomy and Astrophysics

Astronomy

Scientific paper

In this study we test some of the implications of the Unified Model with a sample of 62 Seyfert 1s and 125 Seyfert 2s selected by a mostly isotropic property, their 60μ m fluxes. The 3.6cm continuum data was obtained using the VLA in A-configuration and optical data was retrieved from the DSS. As well, sources from the VLA archive and from the literature were added. We performed statistical tests to examine differences between Seyfert 1s and 2s based on radio luminosity, infrared luminosity, radio extent, and host galaxy inclination. We find the radio and infrared luminosities to be nearly isotropic, fitting the believed structure of the circumnuclear torus, and the ratio of 25μ m to 60μ m luminosities confirms models concerning the distribution of radiation in the torus. The results of radio extent measurements do not show the expected excess of radio large Seyfert 2s, however we discuss factors that could lead to this result. Finally, we show that a relatively larger number of Seyfert 2s reside in edge-on galaxies, which may be due to the galactic plane acting as a putative torus.

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