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2001AJ....121.1369A - Astron. J., 121, 1369-1384 (2001/March-0)
The nonstellar infrared continuum of Seyfert galaxies.
ALONSO-HERRERO A., QUILLEN A.C., SIMPSON C., EFSTATHIOU A. and WARD M.J.
Abstract (from CDS):
The ground-based 4.8 µm and ISO 9.6 µm luminosities are well correlated with the hard X-ray luminosities of Seyfert 1s and 2s. These continuum emissions appear as a good indicator of the AGN luminosity, at least in the cases of hard X-ray Compton-thin Seyfert galaxies (NH≤1024 cm–2). We finally stress the finding that some Compton thick galaxies show bright nonstellar emission at 5 µm. This suggests that the near-infrared emission in Seyfert galaxies is produced in an extended component illuminated by the central source, that is more visible from all viewing angles, providing a good explanation for the differing NH/AV ratios found in some Seyfert 2s. We discuss possible implications of mid-infrared surveys for the search of counterparts of highly obscured hard X-ray sources.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Active - Galaxies: Nuclei - Galaxies: Photometry - Galaxies: Seyfert - Galaxies: Stellar Content - infrared: galaxies
Simbad objects: 21
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