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Astron. Astrophys. 334, 799-804 (1998)

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5. Conclusions and future research

We cannot readily explain the extraordinary high FIR flux density observed in the 3C 47, 3C 207, and 3C 334. While relativistic beaming of a single nonthermal component cannot account for the total FIR radiation, the radiation of relativistically beamed multiple core components is likely to contribute significantly in the far-infrared. Thermal mechanisms could play a role, in combination with optical thickness and aspect effects, but we need more data in the submm and infrared to address these in detail. We are currently engaged in measurements of matched pairs of radio galaxies and quasars, comparing their thermal FIR output by combining cm, mm, submm and FIR data from VLA, JCMT, and ISO observations. In the meantime, we have little doubt that the importance of nonthermal FIR and submm radiation in double-lobed radio sources has been underestimated.

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© European Southern Observatory (ESO) 1998

Online publication: June 2, 1998

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