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dc.creatorPooley, Daviden_US
dc.creatorRappaport, Saulen_US
dc.creatorBlackburne, Jeffrey A.en_US
dc.creatorSchechter, Paul L.en_US
dc.creatorWambsganss, Joachimen_US
dc.date.accessioned2016-04-28T19:37:48Z
dc.date.available2016-04-28T19:37:48Z
dc.date.issued2012-01en
dc.identifierdoi:10.15781/T2W52M
dc.identifier.citationPooley, David, Saul Rappaport, Jeffrey A. Blackburne, Paul L. Schechter, and Joachim Wambsganss. "X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies." The Astrophysical Journal, Vol. 744, No. 2 (Jan., 2012): 111.en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34959
dc.description.abstractWe present a microlensing analysis of 61 Chandra observations of 14 quadruply lensed quasars. X-ray flux measurements of the individual quasar images give a clean determination of the microlensing effects in the lensing galaxy and thus offer a direct assessment of the local fraction of stellar matter making up the total integrated mass along the lines of sight through the lensing galaxy. A Bayesian analysis of the ensemble of lensing galaxies gives a most likely local stellar fraction of 7%, with the other 93% in a smooth, dark matter component, at a mean impact parameter R(c) of 6.6 kpc from the center of the lensing galaxy. We divide the systems into smaller ensembles based on R(c) and find that the most likely local stellar fraction varies qualitatively and quantitatively as expected, decreasing as a function of R(c).en_US
dc.description.sponsorshipNSF AST-0607601en_US
dc.description.sponsorshipChandra GO7-8099en_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.subjectdark matteren_US
dc.subjectgravitational lensing: strongen_US
dc.subjectgravitational lensesen_US
dc.subjectpg 1115+080en_US
dc.subjectacs surveyen_US
dc.subjectsubstructureen_US
dc.subjectdynamicsen_US
dc.subjectcurveen_US
dc.subjecttestsen_US
dc.subjecthalosen_US
dc.subjectprobeen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleX-Ray And Optical Flux Ratio Anomalies In Quadruply Lensed Quasars. II. Mapping The Dark Matter Content In Elliptical Galaxiesen_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.identifier.Filename2012_01_quadruplylensed.pdfen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0004-637x/744/2/111en_US
dc.contributor.utaustinauthorPooley, Daviden_US
dc.relation.ispartofserialAstrophysical Journalen_US


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