Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21723007k&link_type=abstract
American Astronomical Society, AAS Meeting #217, #230.07; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results from our study of the 1.4 GHz radio emission in the kpc-scale lobes of 135 quasars and BL Lac objects belonging to the complete flux-density limited MOJAVE sample. We find that a substantial fraction of BL Lac objects display extended radio powers and morphologies similar to FRII radio galaxies, while many quasars display extended radio powers that are "intermediate" between FRI and FRII radio galaxies. This challenges the simple Unified Scheme that links BL Lacs to FRI and quasars to FRII radio galaxies. We also find that there is a significant correlation between the extended radio emission and parsec-scale jet speeds: the more radio powerful sources possess faster jets. This indicates that the 1.4 GHz radio emission is indeed related to jet kinetic power. Our pilot study of a sub-sample of 27 blazars possessing large extended radio powers with the Chandra X-ray telescope has revealed X-ray jets in nearly 80% of them. The high detection rate of X-ray jets in these relatively high redshift blazars provides support to the inverse Compton (over cosmic microwave background photons) beaming model for X-ray emission. In order to explore these ideas further, we have recently acquired deep 70 ksec images of two superluminal quasars belonging to this sub-sample, viz., 0106+013, and 1641+399 (3C 345). New Hubble Space Telescope imaging data have also been acquired for 1641+399. The preliminary findings of this multi-wavelength study will be presented.
This work is supported by NASA grant GO9-0128X.
Hogan Brandon
Kharb Preeti
Lister Matthew
Marshall Herman
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