HST imaging of redshift z>0.5 7C and 3C Quasars

Details HST imaging of redshift z>0.5 7C and 3C Quasars HST imaging of redshift z>0.5 7C and 3C Quasars

1997-02-05

arxiv.org/abs/astro-ph/9702051v1

Astronomy and Astrophysics

Astrophysics

To appear in the Proceedings of the ESO/IAC Conference on 'Quasar Hosts' - Tenerife 24-27 September 1996

Scientific paper

We present preliminary results from HST imaging of radio-loud quasar hosts, covering a ~x100 range in radio luminosity but in a narrow redshift range (0.5 to 0.65). The sample was selected from our new, spectroscopically complete 7C survey and the 3CRR catalogue. Despite the very large radio luminosity range, the host luminosities are only weakly correlated (if at all) with radio power, perhaps reflecting a predominance of purely central engine processes in the formation of radio jets, and hence perhaps also in the radio-loud/-quiet dichotomy at these redshifts. The results also contradict naive expectations from several quasar formation theories, but the host magnitudes support radio-loud Unified Schemes.

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