2003/09/15 by M. Giroletti, Giroletti, M., G. Giovannini +5
Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Gamma-ray bursts and supernovae #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0309380
5 pages, 4 .eps figures. To appear in ASP Conference Series: "Future Directions in High Resolution Astronomy: A Celebration of the 10th Anniversary of the VLBA", June 8 - 12, 2003, Socorro, New Mexico, USA
arxiv created 2003/09/15 · openalex publication_date 2003/09/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a radio/optical study of a sample of BL Lac objects at arcsecond and milliarcsecond resolution. The sample consists of 30 nearby (z<0.2) BL Lacs, mostly X-ray selected. These nearby objects are weak in the radio, yet we have successfully observed them with the VLA, VLBA and EVN, revealing interesting morphologies. Most importantly, we find evidence of relativistic boosting even in these low power sources (dominant core, one-sided jets). We present a radio/optical comparison including HST observations which have detected compact optical cores in all objects.