X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies
We 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 matte...
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| Format: | Article |
| Language: | en_US |
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Institute of Physics Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/70981 https://orcid.org/0000-0002-5665-4172 https://orcid.org/0000-0003-3182-5569 |
| _version_ | 1826202739320815616 |
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| author | Pooley, David Blackburne, Jeffrey A. Schechter, Paul L. Wambsganss, Joachim Rappaport, Saul A |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Pooley, David Blackburne, Jeffrey A. Schechter, Paul L. Wambsganss, Joachim Rappaport, Saul A |
| author_sort | Pooley, David |
| collection | MIT |
| description | We 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[subscript c] of 6.6 kpc from the center of the lensing galaxy. We divide the systems into smaller ensembles based on R[subscript c] and find that the most likely local stellar fraction varies qualitatively and quantitatively as expected, decreasing as a function of R[subscript c] . |
| first_indexed | 2024-09-23T12:15:46Z |
| format | Article |
| id | mit-1721.1/70981 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:15:46Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | mit-1721.1/709812022-10-01T08:50:22Z X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies Pooley, David Blackburne, Jeffrey A. Schechter, Paul L. Wambsganss, Joachim Rappaport, Saul A Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Schechter, Paul L. Schechter, Paul L. Rappaport, Saul A. We 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[subscript c] of 6.6 kpc from the center of the lensing galaxy. We divide the systems into smaller ensembles based on R[subscript c] and find that the most likely local stellar fraction varies qualitatively and quantitatively as expected, decreasing as a function of R[subscript c] . National Science Foundation (U.S.) (grant AST-0607601) United States. National Aeronautics and Space Administration (Chandra grant GO7-8099) 2012-06-01T15:32:05Z 2012-06-01T15:32:05Z 2012-01 2011-08 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/70981 Pooley, David et al. “X-ray and Optical Flux Ratio Anomalies in Quadruply Lensed Quasars. Ii. Mapping the Dark Matter Content in Elliptical Galaxies.” The Astrophysical Journal 744.2 (2012): 111. Web. https://orcid.org/0000-0002-5665-4172 https://orcid.org/0000-0003-3182-5569 en_US http://dx.doi.org/10.1088/0004-637x/744/2/111 Astrophysical Journal Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf Institute of Physics Publishing Prof. Schechter via Mat Willmott |
| spellingShingle | Pooley, David Blackburne, Jeffrey A. Schechter, Paul L. Wambsganss, Joachim Rappaport, Saul A X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies |
| title | X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies |
| title_full | X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies |
| title_fullStr | X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies |
| title_full_unstemmed | X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies |
| title_short | X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies |
| title_sort | x ray and optical flux ratio anomalies in quadruply lensed quasars ii mapping the dark matter content in elliptical galaxies |
| url | http://hdl.handle.net/1721.1/70981 https://orcid.org/0000-0002-5665-4172 https://orcid.org/0000-0003-3182-5569 |
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