2014/02/10 by Maciej Ceglowski, Ceglowski, Maciej, Magdalena Kunert-Bajraszewska +5
Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #astro-ph.CO #astro-ph.GA #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.1402.2116
4 pages,Proceedings of 11th European VLBI Network Symposium & Users Meeting
arxiv created 2014/02/10 · arxiv updated 2014/06/19
Broad absorption line (BAL) quasars have been studied for over thirty years. Yet it is still unclear why and when we observe broad absorption lines in quasars. Is this phenomenon caused by geometry or is it connected with the evolution process? Variability of the BAL quasars, if present, can give us information about their orientation, namely it can indicate whether they are oriented more pole-on. Using the Torun 32-metre dish equipped with the One Centimetre Receiver Array (OCRA) we have started a monitoring campaign of a sample of compact radio-loud BAL quasars. This 30 GHz variability monitoring program supplements the high-resolution interferometric observations of these objects we have carried out with the EVN and VLBA.