IRAS and near-infrared observations of the Seyfert galaxies MCG 8-11-11, MKN 79 and MKN 279.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 1985
- Bibcode:
- 1985A&A...153...55S
- Keywords:
-
- Infrared Astronomy Satellite;
- Infrared Photometry;
- Seyfert Galaxies;
- Active Galaxies;
- Continuous Spectra;
- Infrared Spectra;
- Near Infrared Radiation;
- Synchrotron Radiation;
- Thermal Emission;
- Astronomy