Characteristics of EGRET Blazars in the VLBA Imaging and Polarimetry Survey VIPS - AstrophysicsReport as inadecuate




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Abstract: We examine the radio properties of EGRET-detected blazars observed as part ofthe VLBA Imaging and Polarimetry Survey VIPS. VIPS has a flux limit roughlyan order of magnitude below the MOJAVE survey and most other samples that havebeen used to study the properties of EGRET blazars. At lower flux levels, radioflux density does not directly correlate with gamma-ray flux density. We dofind that the EGRET-detected blazars tend to have higher brightnesstemperatures, greater core fractions, and possibly larger than average jetopening angles. A weak correlation is also found with jet length and withpolarization. All of the well-established trends can be explained bysystematically larger Doppler factors in the gamma-ray loud blazars, consistentwith the measurements of higher apparent velocities found in monitoringprograms carried out at radio frequencies above 10 GHz.



Author: G. B. Taylor, S. E. Healey, J. F. Helmboldt, S. Tremblay, C. D. Fassnacht, R. C. Walker, L. O. Sjouwerman, T. J. Pearson, A. C. S

Source: https://arxiv.org/







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