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X‐Ray and Optical Flux Ratio Anomalies in Quadruply Lensed Quasars. I. Zooming in on Quasar Emission Regions

D. PooleyAstronomy Department, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720Jeffrey A. BlackburneDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Cambridge, MA 02139S. RappaportDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Cambridge, MA 02139Paul L. SchechterDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Cambridge, MA 02139

2007en

ABI

Annotatsiya

X-ray and optical observations of quadruply lensed quasars can provide a micro-arcsecond probe of the lensed quasar. In this paper we utilize X-ray observations of ten lensed quasars recorded with the Chandra X-ray Observatory as well as corresponding optical data obtained by either the Hubble Space Telescope or ground-based optical telescopes. These are analyzed in a systematic and uniform way with emphasis on the flux-ratio anomalies that are found relative to the predictions of smooth lens models. A comparison of the flux ratio anomalies between the X-ray and optical bands allows us to conclude that the optical emission regions of the lensed quasars are much larger than expected from basic disk models (by factors of ~10-100).

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DOI: 10.1086/512115

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