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Thomson Thick X-ray Absorption in a Broad Absorption Line Quasar, PG 0946+301

Mathur, Smita; Green, Paul; Arav, Nahum; Brotherton, Michael; Crenshaw, M; de Kool, Marthijn; Elvis, M; Goodrich, R.; Hamann, F; Hines, D C; Kashyap, V; Korista, Kirk; Peterson, Byron; Shields, John; Shlosman, I; van Breugel, Willem Johannes Maria; Voit, M

Description

We present a deep ASCA observation of a broad absorption line quasar (BALQSO) PG 0946+301. The source was clearly detected in one of the gas imaging spectrometers, but not in any other detector. If BALQSOs have intrinsic X-ray spectra similar to normal radio-quiet quasars, our observations imply that there is Thomson thick X-ray absorption (NH ≳ 1024 cm-2) toward PG 0946+301. This is the largest column density estimated so far toward a BALQSO. The absorber must be at least partially ionized and...[Show more]

dc.contributor.authorMathur, Smita
dc.contributor.authorGreen, Paul
dc.contributor.authorArav, Nahum
dc.contributor.authorBrotherton, Michael
dc.contributor.authorCrenshaw, M
dc.contributor.authorde Kool, Marthijn
dc.contributor.authorElvis, M
dc.contributor.authorGoodrich, R.
dc.contributor.authorHamann, F
dc.contributor.authorHines, D C
dc.contributor.authorKashyap, V
dc.contributor.authorKorista, Kirk
dc.contributor.authorPeterson, Byron
dc.contributor.authorShields, John
dc.contributor.authorShlosman, I
dc.contributor.authorvan Breugel, Willem Johannes Maria
dc.contributor.authorVoit, M
dc.date.accessioned2015-12-13T23:16:43Z
dc.date.available2015-12-13T23:16:43Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/89545
dc.description.abstractWe present a deep ASCA observation of a broad absorption line quasar (BALQSO) PG 0946+301. The source was clearly detected in one of the gas imaging spectrometers, but not in any other detector. If BALQSOs have intrinsic X-ray spectra similar to normal radio-quiet quasars, our observations imply that there is Thomson thick X-ray absorption (NH ≳ 1024 cm-2) toward PG 0946+301. This is the largest column density estimated so far toward a BALQSO. The absorber must be at least partially ionized and may be responsible for attenuation in the optical and UV. If the Thomson optical depth toward BALQSOs is close to 1, as inferred here, then spectroscopy in hard X-rays with large telescopes like XMM would be feasible.
dc.publisherIOP Publishing
dc.sourceAstrophysical Journal, The
dc.subjectKeywords: Galaxies: active; Quasars: absorption lines; Quasars: individual (PG 0946+301); X-rays: galaxies
dc.titleThomson Thick X-ray Absorption in a Broad Absorption Line Quasar, PG 0946+301
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume533
dc.date.issued2000
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationMigratedxPub19607
local.type.statusPublished Version
local.contributor.affiliationMathur, Smita, Smithsonian Institution
local.contributor.affiliationGreen, Paul, Smithsonian Institution
local.contributor.affiliationArav, Nahum, University of California
local.contributor.affiliationBrotherton, Michael, University of Arizona
local.contributor.affiliationCrenshaw, M, NASA Goddard Space Flight Center
local.contributor.affiliationde Kool, Marthijn, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationElvis, M, Harvard Smithsonian Center for Astrophysics
local.contributor.affiliationGoodrich, R., W M Koch Observatory
local.contributor.affiliationHamann, F, University of Florida
local.contributor.affiliationHines, D C, University of Arizona
local.contributor.affiliationKashyap, V, Harvard Smithsonian Center for Astrophysics
local.contributor.affiliationKorista, Kirk, Western Michigan University
local.contributor.affiliationPeterson, Byron, National Institute for Fusion Science
local.contributor.affiliationShields, John, University of Sydney
local.contributor.affiliationShlosman, I, University of Kentucky
local.contributor.affiliationvan Breugel, Willem Johannes Maria, University of California
local.contributor.affiliationVoit, M, Space Telescope Science Institute
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage79
local.bibliographicCitation.lastpage82
local.identifier.doi10.1086/312617
dc.date.updated2015-12-12T08:49:19Z
local.identifier.scopusID2-s2.0-0034689812
CollectionsANU Research Publications

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