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MAMBO 1.25mm observations of 3CR radio galaxies and quasars at z=1.5: On the debate of the unified schemes | | Martin Haas
; Rolf Chini
; Sven Mueller
; Frank Bertoldi
; Marcus Albrecht
; | | Date: |
5 Sep 2005 | | Subject: | astro-ph | | Abstract: | In order to explore the nature of the 850 micron flux difference between powerful radio galaxies and steep radio-spectrum quasars at z=1.5 reported by Willott et al. (2002), we have observed 9 sources from their sample of 11 quasars at 1.25 mm. For 7 sources the 1.25 mm fluxes are much brighter than one would expect from a purely thermal dust model fitted to the submm data, providing evidence for the synchrotron nature of the observed 1.25 mm radiation. If we extrapolate a power-law synchrotron spectrum to shorter wavelengths, then for 6 of the 9 sources also the 850 micron fluxes are dominated by synchrotron radiation. We discuss how far the (sub)-millimetre data can be interpreted in accordance with the orientation-dependent unified schemes for powerful radio galaxies and quasars. In this case the results challenge the reported evidence for the receding torus model and for the evolutionary trend of a declining dust luminosity with increasing projected size of the radio lobes. | | Source: | arXiv, astro-ph/0509084 | | Services: | Forum | Review | PDF | Favorites | |
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