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dc.contributor.authorKirkpatrick, Allison
dc.contributor.authorUrry, C. Megan
dc.contributor.authorBrewster, Jason
dc.contributor.authorCooke, Kevin C.
dc.contributor.authorEstrada, Michael
dc.contributor.authorGlikman, Eilat
dc.contributor.authorHamblin, Kurt
dc.contributor.authorAnanna, Tonima Tasnim
dc.contributor.authorCarlile, Casey
dc.contributor.authorColeman, Brandon
dc.contributor.authorJohnson, Jordan
dc.contributor.authorKartaltepe, Jeyhan S.
dc.contributor.authorLaMassa, Stephanie M.
dc.contributor.authorMarchesi, Stefano
dc.contributor.authorPowell, Meredith
dc.contributor.authorSanders, Dave
dc.contributor.authorTreister, Ezequiel
dc.contributor.authorTurner, Tracey Jane
dc.date.accessioned2019-11-15T16:32:06Z
dc.date.available2019-11-15T16:32:06Z
dc.date.issued2019-08-15
dc.description.abstractQuasars are the most luminous of active galactic nuclei (AGN), and are perhaps responsible for quenching star formation in their hosts. The Stripe 82X catalog covers 31.3 deg² of the Stripe 82 field, of which the 15.6 deg² covered with XMM-Newton is also covered by Herschel/SPIRE. We have 2500 X-ray detected sources with multi-wavelength counterparts, and 30% of these are unobscured quasars, with LX > 10⁴⁴ erg/s and MB < −23. We define a new population of quasars which are unobscured, have X-ray luminosities in excess of 10⁴⁴ erg/s, have broad emission lines, and yet are also bright in the far-infrared, with a 250 µm flux density of S₂₅₀ > 30 mJy. We refer to these Herscheldetected, unobscured quasars as “Cold Quasars”. A mere 4% (23) of the X-ray- and optically-selected unobscured quasars in Stripe 82X are detected at 250 µm. These Cold Quasars lie at z ∼ 1 − 3, have Mdust ∼ 10⁸ −10⁹ M , have LIR > 10¹² L , and have star formation rates of 200−2000 M /yr. Cold Quasars are bluer in the mid-IR than the full quasar population, and 75% of our Cold Quasars have WISE W3 < 11.5 [Vega], while only 19% of the full quasar sample meets this criteria. Crucially, Cold Quasars have 4−7× as much star formation as the unobscured quasar population at similar redshifts. This phase is likely short-lived, as the central engine and immense star formation consume the gas reservoir. Cold Quasars are type-1 blue quasars that reside in starburst galaxies.en_US
dc.description.sponsorshipThis research is based upon work supported by NASA under award No. 80NSSC18K0418 to Yale University and by the National Science Foundation under Grant No. AST-1715512. E.T. acknowledges support from FONDECYT Regular 1160999 and 1190818, CONICYT PIA ACT172033 and Basal-CATA AFB170002 grants. A.K. gratefully acknowledges support from the YCAA Prize Postdoctoral Fellowship. E.G. acknowledges the generous support of the Cottrell College Award through the Research Corporation for Science Advancement.en_US
dc.description.urihttps://arxiv.org/abs/1908.04795en_US
dc.format.extent13 pagesen_US
dc.genrejournal articles preprintsen_US
dc.identifierdoi:10.13016/m2r9be-ouul
dc.identifier.citationKirkpatrick, Allison; Urry, C. Megan; Brewster, Jason; Cooke, Kevin C.; Estrada, Michael; Glikman, Eilat; Hamblin, Kurt; Ananna, Tonima Tasnim; Carlile, Casey; Coleman, Brandon; Johnson, Jordan; Kartaltepe, Jeyhan S.; LaMassa, Stephanie M.; Marchesi, Stefano; Powell, Meredith; Sanders, Dave; Treister, Ezequiel; Turner, Tracey Jane; The Accretion History of AGN: A Newly Defined Population of Cold Quasars; Astrophysics of Galaxies (2019); https://arxiv.org/abs/1908.04795v1en_US
dc.identifier.urihttp://hdl.handle.net/11603/16330
dc.language.isoen_USen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Physics Department
dc.relation.ispartofUMBC Student Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.subjectquasarsen_US
dc.subjectactive galactic nucleien_US
dc.subjectstarburst galaxiesen_US
dc.titleThe Accretion History of AGN: A Newly Defined Population of Cold Quasarsen_US
dc.typeTexten_US


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