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We investigate the Fermi LAT gamma-ray and 15 GHz VLBA radio properties of ajoint gamma-ray- and radio-selected sample of AGNs obtained during the first 11months of the Fermi mission (2008 Aug 4 - 2009 Jul 5). Our sample contains thebrightest 173 AGNs in these bands above declination -30 deg. during thisperiod, and thus probes the full range of gamma-ray loudness (gamma-ray toradio band luminosity ratio) in the bright blazar population. The latterquantity spans at least four orders of magnitude, reflecting a wide range ofspectral energy distribution (SED) parameters in the bright blazar population.The BL Lac objects, however, display a linear correlation of increasinggamma-ray loudness with synchrotron SED peak frequency, suggesting a universalSED shape for objects of this class. The synchrotron self-Compton model isfavored for the gamma-ray emission in these BL Lacs over external seed photonmodels, since the latter predict a dependence of Compton dominance on Dopplerfactor that would destroy any observed synchrotron SED peak - gamma-rayloudness correlation. The high-synchrotron peaked (HSP) BL Lac objects aredistinguished by lower than average radio core brightness temperatures, andnone display large radio modulation indices or high linear core polarizationlevels. No equivalent trends are seen for the flat-spectrum radio quasars(FSRQ) in our sample. Given the association of such properties withrelativistic beaming, we suggest that the HSP BL Lacs have generally lowerDoppler factors than the lower-synchrotron peaked BL Lacs or FSRQs in oursample.

Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program