Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-01-09
A&A 368, 414 (2001)
Astronomy and Astrophysics
Astrophysics
6 pages, 1 figure, accepted by A&A
Scientific paper
10.1051/0004-6361:20010040
In order to study the nature of the far-infrared emission observed in radio-loud active galaxies, we have obtained 1.2 mm observations with the IRAM 30 m telescope for a sample of eight radio-loud active galaxies. In all objects we find that the 1.2 mm emission is dominated by non-thermal emission. An extrapolation of the non-thermal radio spectrum indicates that the contribution of synchrotron emission to the far-infrared is less than 10% in quasars, and negligible in the radio galaxies. The quasars in the sample show signs of relativistic beaming at millimeter wavelengths, and the quasar 3C334 shows evidence for strong variability.
Bemmel Ilse van
Bertoldi Frank
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