Description
We compare the milliarcsecond-scale morphology of scintillating and nonscintillating sources. The scintillating sources are drawn from those flat-spectrum extragalactic radio sources discovered, by the Micro-Arcsecond Scintillation-Induced Variability Survey (MASIV, Lovell et al, 2003AJ....126.1699L), to have flux density variability at 5GHz on timescales from hours to days. Intrinsic source structure information is obtained from previously published and/or publicly available 8.4GHz Very Long Baseline Array images. A sample of low flux density (S_{nu}=5GHz_<0.3Jy) scintillating sources was compared with a sample of high flux density (S_{nu}=5GHz_~1Jy) scintillators, as well as a sample of high flux density nonscintillators.
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