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| Paper: |
On the Intrinsic Jet Properties of Fermi-detected Blazars |
| Volume: |
427, Accretion and Ejection in AGN: a Global View |
| Page: |
306 |
| Authors: |
Savolainen, T.; Homan, D. C.; Hovatta, T.; Kadler, M.; Kovalev, Y. Y.; Lister, M. L.; Ros, E.; Zensus, J. A. |
| Abstract: |
We report on an analysis of intrinsic jet properties between sources
detected by the Fermi Gamma-ray Space Telescope during its first three
months of science operations and those not detected in a sample 62
blazars. By combining high-resolution VLBI images and millimetre-wavelength
flux density monitoring data, we have estimated their jet Doppler factors,
Lorentz factors, and viewing angles in the observer’s frame and in the frame
comoving with the jet. The analysis shows that, in addition to having on
average higher variability Doppler factors, the blazars detected by the Fermi have a distribution of comoving frame viewing angles that is
significantly narrower than that of the γ-ray weak blazars and
centred roughly perpendicular to the jet axis. The lack of γ-ray
bright blazars at small comoving frame viewing angles hints that their
γ-ray emission may be intrinsically anisotropic or depend on the
Lorentz factor. |
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