IRAS and near-infrared observations of the Seyfert galaxies MCG 8-11-11, MKN 79 and MKN 279

Details IRAS and near-infrared observations of the Seyfert galaxies MCG 8-11-11, MKN 79 and MKN 279 IRAS and near-infrared observations of the Seyfert galaxies MCG 8-11-11, MKN 79 and MKN 279

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...153...55s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 153, no. 1, Dec. 1985, p. 55-63. Research supported by the University of South

Astronomy and Astrophysics

Astronomy

12

Infrared Astronomy Satellite, Infrared Photometry, Seyfert Galaxies, Active Galaxies, Continuous Spectra, Infrared Spectra, Near Infrared Radiation, Synchrotron Radiation, Thermal Emission

Scientific paper

IRAS-pointed observations and near-infrared photometry of the Seyfert galaxies MCG 8-11-11, Mkn 79 and Mkn 279 are presented. Superimposed on a power law behaviour with α = -1.2, MCG 8-11-11 shows an excess at 25 μm which can be accounted for by black body emission at ≡200K from a dust emitting region of 73 pc or more. Mkn 79 has a single power law spectrum from 1 to 100 μm with α = -1.0. The spectrum of Mkn 279 from 12 to 100 μm can be fitted with a power law spectral index α = -1.44, breaking to a flatter spectrum at around 10 μm. Alternatively, the near-infrared data of this object can be interpreted in terms of a strong galactic component emerging over the underlying power law. The infrared observations are discussed and compared to measurements taken from the same objects at other wavelengths.

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