Environmental and Clustering Properties of BL Lac and FSRQ Blazars

Abstract

We present results from a large-scale study of the megaparsec-scale environments of blazars, including BL Lac objects and flat-spectrum radio quasars. Using the catalog of galaxies from the Sloan Digital Sky Survey DR10 catalog, we compute spatial covariance amplitudes for a sample of 757 blazars. The covariance amplitudes are analyzed to compute the relative levels of clustering for various blazar types. We also compare the clustering of blazars to FR I and FR II radio galaxies to explore possibility of a parent population in the context of a blazar sequence. Finally, we present preliminary results on the morphologies of galaxies located within 1 Mpc of blazars, with classifications supplied by Galaxy Zoo data.