Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.0720m&link_type=abstract
American Astronomical Society, HEAD meeting #12, #7.20
Astronomy and Astrophysics
Astronomy
Scientific paper
We report on recent results from a Chandra X-ray Observatory survey of quasars. The survey consisted of 54 quasars with redshifts from 0.15 to 2.5 with known radio-emitting jets. The detection rate was about 65%, depending primarily on the brightness of the extended radio emission. The distribution of the radio to X-ray flux ratio is very broad; the log-normal distribution has a FWHM of 1.4 dex, a factor of about 25 in the flux ratio. We describe tests of a model where the bulk of the X-ray emission arises from inverse Compton scattering of microwave background photons (the IC-CMB) model. For a subset of our sample with known superluminal motion based on VLBI observations, we estimate the angle of the kpc-scale jet to the line of sight by considering the additional information in the bends observed between pc- and kpc-scale jets. These angles are sometimes much smaller than estimates based on the IC-CMB model with a Lorentz factor of 15, indicating that these jets may decelerate significantly from pc scales to kpc scales. We will also report new results from deeper imaging of individual objects with Chandra and HST.
Birkinshaw Mark
Gelbord Jonathan
Godfrey L.
Jauncey Dave
Lovell Jim
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