Orientation Effects in the X-ray Properties of High-z 3CRR Quasars

Belinda J. Wilkes, J. Kuraszkiewicz, M. Haas, R. Antonucci, M. Ashby, P. Barthel, M. Birkinshaw, R. Chini, G. Fazio, C. Lawrence, C. Leipski, P. Ogle, B. Schulz, S. Willner, F. Heymann, D. Worrall



A critical problem in understanding active galaxies is separation of intrinsic physical differences from observed differences due to orientation. Relativistic motion in powerful radio sources produces a significant level of anisotropic emission at all but the lowest frequencies. Obscuration is also anisotropic and strongly frequency-dependent. Combined, these two effects result in complex selection effects for observations in most wavebands, and there are few ways to select a sample that is sufficiently unbiased to test orientation effects as predicted by unification models. Low-frequency radio emission is one way to select an orientation-unbiased sample, albeit limited to the minority of AGN with strong radio emission. We report X-ray observations of a complete, flux-limited sample of 38 high-redshift 3CRR sources, 1
Originele taal-2English
StatusPublished - jan.-2011
EvenementAmerican Astronomical Society, AAS Meeting #217, #230.04 - Seattle, WA, United States
Duur: 9-jan.-201113-jan.-2011


ConferenceAmerican Astronomical Society, AAS Meeting #217, #230.04
Land/RegioUnited States
StadSeattle, WA


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