Please use this identifier to cite or link to this item: 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
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
Keywords: ACTIVE GALACTIC NUCLEI
STAR-FORMING GALAXIES
SPECTRAL
ENERGY-DISTRIBUTIONS
SUPERMASSIVE BLACK-HOLES
RADIO-QUIET QUASARS
DIGITAL SKY SURVEY
AGN DUSTY TORI
MU-M
OPTICAL IDENTIFICATIONS
SUBMILLIMETER GALAXIES
Issue Date: 2009
Publisher: WILEY-BLACKWELL PUBLISHING, INC
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.
URI: http://hdl.handle.net/2307/276
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2009.14675.x
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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