http://dspace-roma3.caspur.it:80 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Sun, 19 May 2013 22:46:52 GMT 2013-05-19T22:46:52Z http://dspace-roma3.caspur.it/image/logo_roma3.jpg http://dspace-roma3.caspur.it:80 http://hdl.handle.net/2307/276 <Title>The HELLAS2XMM survey - XII. The infrared/submillimetre view of anX-ray selected type 2 quasar at z approximate to 2</Title> <Authors>Vignali, Cristian; Pozzi, Francesca; Fritz, Jacopo; Comastri, Andrea; Gruppioni, Carlotta; Bellocchi, Enrica; Fiore, Fabrizio; Brusa, Marcella; Maiolino, Roberto; Mignoli, Marco; La Franca, Fabio; Pozzetti, Lucia; Zamorani, Giovanni; Merloni, Andrea</Authors> <Issue Date>2009</Issue Date> <Is part of>MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY</Is part of> <Volume>395</Volume> <Pages>2189-2195</Pages> <Abstract>We present multiwavelength observations (from optical to submillimetre,including Spitzer and Submillimetre Common-User Bolometer Array) ofH2XMMJ003357.2-120038 (also GD158_19), an X-ray selected, luminousnarrow-line (type 2) quasar at z = 1.957 selected from the HELLAS2XMMsurvey. Its broad-band properties can be reasonably well modelledassuming three components: a stellar component to account for theoptical and near-infrared (IR) emission; an active galactic nucleus(AGN) component (i.e. dust heated by an accreting active nucleus),dominant in the mid-IR, with an optical depth at 9.7 mu m along theline of sight ( close to the equatorial plane of the obscuring matter)of tau(9.7) = 1 and a full covering angle of the reprocessing matter(torus) of 140 degrees and a far-IR starburst component (i.e. dustheated by star formation) to reproduce the wide bump observed longwardof 70 mu m.The derived star formation rate is approximate to 1500M(circle dot)yr(-1). The overall modelling indicates that GD158_19 is ahigh-redshift X-ray luminous, obscured quasar with coeval powerful AGNactivity and intense star formation. It is probably caught before theprocess of expelling the obscuring gas has started, thus quenching thestar formation.</Abstract> Wed, 31 Dec 2008 23:00:00 GMT http://hdl.handle.net/2307/276 2008-12-31T23:00:00Z