Fulltext

Obscured quasars at high redshift in the UKIDSS Ultra Deep Survey

Botti, Ismael ; Almaini, Omar ; Hartley, Will ; Mortlock, Alice ; Lira, Paulina

In: Proceedings of the International Astronomical Union, 2013, vol. 9, no. S304, p. 48-51

Ajouter à la liste personnelle
    Titre
    • Obscured quasars at high redshift in the UKIDSS Ultra Deep Survey
    Auteur
    • Botti, Ismael. University of Nottingham, School of Physics & Astronomy, Nottingham, NG7 2RD, U.K. email: ppxib1@nottingham.ac.uk, omar.almaini@nottingham.ac.uk
    • Almaini, Omar. University of Nottingham, School of Physics & Astronomy, Nottingham, NG7 2RD, U.K. email: ppxib1@nottingham.ac.uk, omar.almaini@nottingham.ac.uk
    • Hartley, Will. ETH Zurich, Switzerland email: hartleyw@phys.ethz.ch
    • Mortlock, Alice. Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, EH9 3HJ, U.K. email: alicem@roe.ac.uk
    • Lira, Paulina. Depto. de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Santiago, Chile email: plira@das.uchile.cl
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Proceedings of the International Astronomical Union, 2013, vol. 9, no. S304, p. 48-51. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:294610
    Summary
    Obscured quasars hidden in deep X-ray surveys can be recovered by looking at mid-infrared wavelengths, where dust re-radiates the absorbed radiation. Here we present a sample of obscured quasars in the redshift range 1 < z < 4 based on data from the UKIDSS Ultra-Deep Survey (UDS), the deepest near-IR survey over ~ 1 sq. deg. to date. Candidates that are primarily selected by their 24 μm emission are probed by decomposing their spectral energy distribution (SED) to disentangle the emission from the AGN and its host galaxy. We show preliminary results on their host galaxy properties as well as their clustering, showing that obscured quasars are found in galaxies located in the green valley, residing in dark matter haloes not different from normal galaxies at those redshifts