@article{10902/25197,
year = {2017},
month = {6},
url = {http://hdl.handle.net/10902/25197},
abstract = {We present the results of a multiwavelength study of a sample of high-redshift radio-loud (RL) broad absorption line (BAL) quasars. This way, we extend to higher redshift previous studies on the radio properties and broad-band optical colours of these objects. We have selected a sample of 22 RL BAL quasars with 3.6 ? z ? 4.8 cross-correlating the FIRST radio survey with the Sloan Digital Sky Survey (SDSS). Flux densities between 1.25 and 9.5 GHz have been collected with the Jansky Very Large Array and Effelsberg-100 m telescopes for 15 BAL and 14 non-BAL quasars used as a comparison sample. We determine the synchrotron peak frequency, constraining their age. A large number of gigahertz peaked spectrum and high-frequency peakers sources have been found in both samples (80 per cent for BAL and 71 per cent for non-BAL quasars), not suggesting a younger age for BAL quasars. The spectral index distribution provides information about the orientation of these sources, and we find statistically similar distributions for the BAL and non-BAL quasars in contrast to work done on lower redshift samples. Our sample may be too small to convincingly find the same effect, or might represent a real evolutionary effect based on the large fraction of young sources. We also study the properties of broad-band colours in both optical (SDSS) and near- and mid-infrared (UK Infrared Telescope Deep Sky Survey and Wide-field Infrared Survey Explorer ?WISE) bands, finding that also at high-redshift BAL quasars tend to be optically redder than non-BAL quasars. However, these differences are no more evident at longer wavelength, when comparing colours of the two samples by mean of the WISE survey.},
organization = {ACKNOWLEDGEMENTS This work has been funded by the Spanish Ministerio de Econom´ıa y Competitividad (MINECO) under projects AYA2011-29517-C03- 02 and AYA2014-58861-C3-2-P. The research leading to these re[1]sults has received funding from the European Commission Seventh Framework Programme (FP/2007-2013) under grant agreement no. 283393 (RadioNet3). This work is partially based on observations with the 100-m telescope of the MPIfR (Max-Planck-Institut fur¨ Radioastronomie) at Effelsberg. We thank the Effelsberg operators for their useful help. DT also thanks the University of Wyoming for hosting his useful and nice three-month visit at their Department of Physics and Astronomy. Finally, thank you to the anonymous referee, whose constructive comments assisted in clarifying and improving complex parts of the paper. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agree[1]ment by Associated Universities, Inc. This research has made use of the NASA/IPAC Infrared Science Archive and NASA/IPAC Extragalactic Database (NED), which are both operated by the Jet Propulsion Laboratory, California Institute of Technology, un[1]der contract with the National Aeronautics and Space Adminis[1]tration. Use has been made of the SDSS Archive. The SDSS is managed by the Astrophysical Research Consortium (ARC) for the participating institutions: The University of Chicago, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The John Hopkins University, Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck[1]Institute for Astrophysics (MPA), New Mexico State University, University of Pittsburgh, Princeton University, the United States Naval Observatory and the University of Washington.},
publisher = {Oxford University Press},
publisher = {MNRAS 467, 4763?4776 (2017)},
title = {A multiwavelength continuum characterization of high-redshift broad absorption line quasars},
author = {Tuccillo, Diego and Bruni, G. and DiPompeo, M. A. and Brotherton, M. S. and Pasetto, A. and González Serrano, José Ignacio and Mack, K. H.},
}