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dc.creatorBonning, E. W.en_US
dc.creatorShields, Gregory A.en_US
dc.creatorStevens, A. C.en_US
dc.creatorSalviander, Sarahen_US
dc.date.accessioned2016-04-28T22:22:21Z
dc.date.available2016-04-28T22:22:21Z
dc.date.issued2013-06en
dc.identifierdoi:10.15781/T21J99
dc.identifier.citationBonning, E. W., G. A. Shields, A. C. Stevens, and S. Salviander. "Accretion disk temperatures of QSOs: constraints from the emission lines." The Astrophysical Journal, Vol. 770, No. 1 (Jun., 2013): 30.en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35221
dc.description.abstractWe compare QSO emission-line spectra to predictions based on theoretical ionizing continua of accretion disks. The observed line intensities do not show the expected trend of higher ionization with theoretical accretion disk temperature as predicted from the black hole mass and accretion rate. Consistent with earlier studies, this suggests that the inner disk does not reach temperatures as high as expected from standard disk theory. Modified radial temperature profiles, taking account of winds or advection in the inner disk, achieve better agreement with observation. The emission lines of radio-detected and radio-undetected sources show different trends as a function of the theoretically predicted disk temperature.en_US
dc.description.sponsorshipAlfred P. Sloan Foundationen_US
dc.description.sponsorshipParticipating Institutionsen_US
dc.description.sponsorshipNational Aeronautics and Space Administrationen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.description.sponsorshipU.S. Department of Energyen_US
dc.description.sponsorshipJapanese Monbukagakushoen_US
dc.description.sponsorshipMax Planck Societyen_US
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectblack hole physicsen_US
dc.subjectgalaxies: activeen_US
dc.subjectquasars: generalen_US
dc.subjectactive galactic nucleien_US
dc.subjectx-ray sourcesen_US
dc.subjectblack-holeen_US
dc.subjectbulge relationshipen_US
dc.subjectquasarsen_US
dc.subjectcontinuumen_US
dc.subjectultravioleten_US
dc.subjectsizeen_US
dc.subjectevolutionen_US
dc.subjectspectraen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleAccretion Disk Temperatures Of QSOs: Constraints From The Emission Linesen_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.identifier.Filename2013_06_accretiondisk.pdfen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0004-637x/770/1/30en_US
dc.contributor.utaustinauthorShields, Gregory A.en_US
dc.contributor.utaustinauthorStevens, A. C.en_US
dc.contributor.utaustinauthorSalviander, Sarahen_US
dc.relation.ispartofserialAstrophysical Journalen_US


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