出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The recent Deep X-ray Radio Blazar Survey (DXRBS) has identified a sample of BL Lac objects
spanning the intermediate range of spectral energy distributions between “classical” X-ray
selected and radio-selected samples of BL Lacs. Detailed studies of such samples are needed to
answer some of the currently open questions regarding the nature of BL Lacs and their place in
a unified model of AGN. High-resolution radio imaging provides direct information on jet evolution
and beaming parameters. We present some preliminary results from EVN & MERLIN
observations of sources in the DXRBS BL Lac sample for which little or no high-resolution radio
data were previously available.
