The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. http://dspace-roma3.caspur.it:80 2013-05-24T20:33:26Z 2013-05-24T20:33:26Z 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 http://hdl.handle.net/2307/276 2011-12-22T13:35:27Z 2008-12-31T23:00:00Z

<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>

2008-12-31T23:00:00Z