1-20 micron infrared photometry of 3CR radio galaxies

Details 1-20 micron infrared photometry of 3CR radio galaxies 1-20 micron infrared photometry of 3CR radio galaxies

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...280..574e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 280, May 15, 1984, p. 574-579.

Astronomy and Astrophysics

Astronomy

24

Astronomical Photometry, Infrared Astronomy, Infrared Photometry, Radio Galaxies, Astronomical Catalogs, Continuous Spectra, Cosmic Dust, Emission Spectra, Line Spectra

Scientific paper

Seven emission-line radio galaxies in the wavelength range from 1 to 20 microns were observed in February 1983. Three broad emission-line galaxies (BLRGs 3C 109, 3C 234, and 3C 445), and four narrow emission-line radio galaxies (NLRGs 3C 98, 3C 198, 3C 223, and 3C 293) were found. The BLRGs showed strong infrared fluxes beyond 3.5 microns, with steep infrared slopes similar to optical slopes. In a comparison with earlier observational data it was found that two of the BLRGs are variable in the JHK filter range without a change of slope. The NLRGs showed strong excess at 10 microns and normal elliptical galaxy colors at JHK and L. Simple predictions based on type-2 Seyfert galaxies show that strong infrared excesses are absent.

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