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Date and Time of the Query: 2019-06-25 T08:19:09 PDT
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For refcode 1988ApJ...333....1M:
Retrieve 16 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1988ApJ...333....1M A NEAR-INFRARED AND OPTICAL STUDY OF X-RAY SELECTED SEYFERT GALAXIES. II. MODELS AND INTERPRETATION CHRSTOPHER W. McALARY AND G. H. RIEKE Steward Observatory, University of Arizona Received 1985 July 24; accepted 1987 July 22 ABSTRACT A model has been constructed which uses a Hubble-law growth curve, modified by a color-morphological type-aperture relation, to deconvolve multiaperture optical and near-infrared photometry of Seyfert galaxies into the stellar and the nonstellar nuclear emission. This model has been applied to a homogeneous set of measurements of 16 type 1 Seyfert galaxies. The resultant nonstellar spectra of Seyfert 1 galaxies can be subdivided into at least five distinct components: 1. the "blue bump," which is seen in the U and B photometric bands and is well known from optical spectrophotometry; 2. a flat continuum which may or may not dominate the remainder of the optical region out to 1-1.5 microns and may reemerge in the far-infrared or submillimeter; 3. nuclear line emission, which is often confused with the flat optical continuum; 4. an infrared component which rises steeply between 2 and 4 microns ({alpha} ~ -2) and continues past 10 microns; 5. far-infrared emission from the surrounding galaxy. The K -L color temperatures of the fourth component are remarkably constant for the sample considered here, 1040 +/- 180 K. Because this feature occurs at approximately the same wavelength for Seyfert galaxies of widely varying luminosities, it is not likely to be nonthermal in nature, but is more probably hot dust which is forming at the outer edges of the broad-line regions, where the temperature falls below the sublimation temperature for grains. Subject headings: galaxies : photometry - galaxies: Seyfert - infrared: sources - radiation mechanisms
Retrieve 16 NED objects in this reference.
Please click here for ADS abstract

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