X-Ray Emission from the Quasar PKS 1127-145: Comptonized IR Photons on Parsec Scales

摘要

We model the broad-band spectral energy distribution of the innermost"core-jet" region of the redshift z=1.187 quasar PKS 1127-145. We propose ascenario where the high energy photons are produced via the Compton scatteringof thermal IR radiation by the relativistic particles in a parsec-scale jet.The high energy spectrum, together with the observed radio variability andsuperluminal expansion, suggest that PKS 1127-145 may be a blazar, despite thefact that its optical/UV component is likely dominated by thermal radiationfrom an accretion disk. The relation of PKS 1127-145 to MeV - blazars isdiscussed.