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dc.contributor.authorZappacosta, L
dc.contributor.authorPiconcelli, E
dc.contributor.authorDuras, F
dc.contributor.authorVignali, C
dc.contributor.authorValiante, R
dc.contributor.authorBianchi, S
dc.contributor.authorBongiorno, A
dc.contributor.authorFiore, F
dc.contributor.authorFeruglio, C
dc.contributor.authorLanzuisi, G
dc.contributor.authorMaiolino, R
dc.contributor.authorMathur, S
dc.contributor.authorMiniutti, G
dc.contributor.authorRicci, C
dc.date.accessioned2018-10-03T04:44:04Z
dc.date.available2018-10-03T04:44:04Z
dc.date.issued2018
dc.identifier.issn0004-6361
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/283045
dc.description.abstractWe present a 155ks NuSTAR observation of the $z\sim2$ hot dust-obscured galaxy (hot DOG) W1835+4355. We extracted spectra from the two NuSTAR detectors and analyzed them jointly with the archival XMM PN and MOS spectra. We performed a spectroscopic analysis based on both phenomenological and physically motivated models employing toroidal and spherical geometry for the obscurer. In all the modelings, the source exhibits a Compton-thick column density $N_{\rm H} \gtrsim 10^{24}$ cm$^{-2}$, a 2-10 keV luminosity $L_{2-10}\approx2\times10^{45}$ erg s$^{-1}$ , and a prominent soft excess ($\sim5-10$ % of the primary radiative output), which translates into a luminosity $\sim10^{44}$ erg s$^{-1}$. We modeled the spectral energy distribution from 1.6 to 850 $\mu m$ using a clumpy two-phase dusty torus model plus a modified blackbody to account for emission powered by star formation in the far-infrared. We employed several geometrical configurations consistent with those applied in the X-ray analysis. In all cases we obtained a bolometric luminosity $L_{\rm bol}\approx3-5\times10^{47}$ erg s$^{-1}$, which confirms the hyperluminous nature of this active galactic nucleus. Finally, we estimate a prodigious star formation rate of $\sim$3000 $M_{\odot}\,yr^{-1}$, which is consistent with the rates inferred for $z\approx2-4$ hyperluminous type I quasars. The heavily obscured nature, together with $L_{\rm bol}$, the ratio of X-ray to mid-infrared luminosity, the rest-frame optical morphology, and the host star formation rate are indicative of its evolutionary stage. We can interpret this as a late-stage merger event in the transitional, dust-enshrouded, evolutionary phase eventually leading to an optically bright AGN.
dc.description.sponsorshipERC STFC
dc.publisherEDP Sciences
dc.titleThe hyperluminous Compton-Thick z ∼ 2 quasar nucleus of the hot DOG W1835+4355 observed by NuSTAR
dc.typeArticle
prism.publicationDate2018
prism.publicationNameAstronomy and Astrophysics
prism.volume618
dc.identifier.doi10.17863/CAM.30408
dcterms.dateAccepted2018-06-29
rioxxterms.versionofrecord10.1051/0004-6361/201732557
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-10-01
dc.contributor.orcidMaiolino, Roberto [0000-0002-4985-3819]
dc.identifier.eissn1432-0746
rioxxterms.typeJournal Article/Review
pubs.funder-project-idScience and Technology Facilities Council (ST/M001172/1)
pubs.funder-project-idEuropean Research Council (695671)
cam.issuedOnline2018-10-09
cam.orpheus.successThu Jan 30 10:54:37 GMT 2020 - The item has an open VoR version.
rioxxterms.freetoread.startdate2100-01-01


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