Radio morphology and parent population of X-ray selected BL Lacertae objects

Astronomy and Astrophysics – Astronomy

Scientific paper

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Bl Lacertae Objects, Radio Astronomy, Galactic Clusters, Heao 1, Radio Galaxies, Radio Jets (Astronomy), Sky Surveys (Astronomy), Spaceborne Astronomy, Very Large Array (Vla)

Scientific paper

High-dynamic range (typically 1700:1) radio maps of 15 X-ray BL Lac (XBL) objects from the HEAO-1 Large Area Sky Survey are presented. Morphological characteristics of these sources are compared with Fanaroff-Riley (FR) class I radio galaxies in the context of unified schemes, with reference to one-sided kiloparsec-scale emission. Evidence that cluster membership of XBLs is significantly higher than previously thought is also presented. It is shown that the extended radio powers, X-ray emission, core-to-lobe ratios, and linear sizes of the radio selected BL Lac (RBL) and XBL populations are consistent with an FR I radio galaxy parent population. A source list and VLA observing log and map parameters are provided.

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