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Multiwavelength tests of the dusty torus model for Seyfert galaxiesWe present a compilation of emission properties for a sample of 116 Seyfert galaxies based on both previously unpublished data and measurements available in the literature. These measurements include fluxes in the emission lines (O III) lambda(5007) and H-beta, as well as the infrared (25-60 microns), ultraviolet (1450 A), soft (0.2-4 keV), and hard (2-10 keV) X-ray continua. These are used to try to distinguish between isotropic and anisotropic emission properties of Seyfert galaxies. The distribution functions of (O III) lambda 5007 infrared, and hard X-ray continuum are similar for Seyfert 1's and Seyfert 2's, consistent with these properties being isotropic. The ultraviolet and soft X-ray continua of Seyfert 2's are underluminous relative to the type 1's suggesting photons at these energies escape from the central source anisotropically. There is a correlation between the ultraviolet continuum and emission-line fluxes in Seyfert 1's consistent with the idea that the central engine is responsible for powering the line emission. No such correlation is found for the Seyfert 2's. Instead, the scatter in the plot of ultraviolet continuum versus line emission suggests the true nuclear continuum luminosity is not seen at Earth in these objects. These properties are consistent with those expected in the dusty torus model.
Document ID
19950037393
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mulchaey, John S.
(Space Telescope Science Institute, Baltimore, MD United States)
Koratkar, Anuradha
(Space Telescope Science Institute, Baltimore, MD United States)
Ward, Martin J.
(Univ. of Oxford Oxford, United Kingdom)
Wilson, Andrew S.
(Space Telescope Science Institute, Baltimore, MD United States)
Whittle, Mark
(Univ. of Virginia, Charlottesville, VA United States)
Antonucci, Robert R. J.
(Univ. of California, Santa Barbara, CA United States)
Kinney, Anne L.
(Space Telescope Science Institute, Baltimore, MD United States)
Hurt, Todd
(Univ. of California, Santa Barbara, CA United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1994
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 436
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A68992
Funding Number(s)
CONTRACT_GRANT: NAGW-2689
CONTRACT_GRANT: NAGW-3268
CONTRACT_GRANT: NAG5-1730
Distribution Limits
Public
Copyright
Other

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