Investigating the radio-loud phase of broad absorption line quasars
نویسندگان
چکیده
منابع مشابه
The Compact Structure of Radio-Loud Broad Absorption Line Quasars
We present the results of EVN+MERLIN VLBI polarization observations of 8 Broad Absorption Line (BAL) quasars at 1.6 GHz, including 4 LoBALs and 4 HiBALs with either steep or flat spectra on VLA scales. Only one steep-spectrum source, J1122+3124, shows two-sided structure on the scale of 2 kpc. The other four steep-spectrum sources and three flat-spectrum sources display either an unresolved ima...
متن کاملBroad Absorption Line Quasars and the Radio–Loud/Radio–Quiet Dichotomy
The observation that the extremely broad, blueshifted absorption troughs which characterize broad absorption line quasars (BALQs) occur exclusively in radio–quiet quasars (RQQs) suggests that this class of active galactic nuclei (AGN) may offer important clues to the radio–loud/radio–quiet (RL/RQ) dichotomy in quasars. Interestingly, there is also substantial observational evidence for similar,...
متن کاملDiscovery of Radio-loud Broad Absorption Line Quasars Using Ultraviolet Excess and Deep Radio Selection
We report the discovery of five broad-absorption-line (BAL) QSOs in a complete sample of 111 ultraviolet excess (UVX) QSO candidates also detected in the NRAO VLA Sky Survey. All five BAL QSOs, which include two high-ionization BAL QSOs and three low-ionization BAL QSOs, are formally radio-loud. Of QSOs with z > 0.4, 3±2% show low-ionization BALs, and of QSOs with z > 1.5, all radio-loud, 9±5% ...
متن کاملRestarting radio activity and dust emission in radio-loud broad absorption line quasars
1 Max-Planck Institute for Radio Astronomy, Auf dem Hügel 69, 53121 Bonn, Germany e-mail: [email protected] 2 INAF–Istituto di Radioastronomia, via P. Gobetti 101, 40129 Bologna, Italy 3 European Southern Observatory, Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago de Chile, Chile 4 Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA Dwingeloo, The Netherlands 5 Kaptey...
متن کاملA Chandra Survey of the X-ray Properties of Broad Absorption Line Radio-Loud Quasars
This work presents the results of a Chandra study of 21 broad absorption line (BAL) radio-loud quasars (RLQs). We conducted a Chandra snapshot survey of 12 bright BAL RLQs selected from SDSS/FIRST data and possessing a wide range of radio and C IV absorption properties. Optical spectra were obtained nearly contemporaneously with the Hobby-Eberly Telescope; no strong flux or BAL variability was ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2014
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201424424