Journal
ASTROPHYSICAL JOURNAL
Volume 712, Issue 1, Pages 668-673Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/712/1/668
Keywords
gravitational lensing: micro; methods: numerical; quasars: individual (Q2237+0305)
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Funding
- Ohio Supercomputer Center
- NSF [AST-0708082]
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Using a microlensing analysis of 11 years of OGLE V-band photometry of the four image gravitational lens Q2237+0305, we measure the inclination i of the accretion disk to be cos i > 0.66 at 68% confidence. Very edge on (cos i < 0.39) solutions are ruled out at 95% confidence. We measure the V-band radius of the accretion disk, defined by the radius where the temperature matches the monitoring band photon emission, to be R-V = 5.8(-2.3)(+3.8) x 10(15) cm assuming a simple thin disk model and including the uncertainties in its inclination. The projected radiating area of the disk remains too large to be consistent with the observed flux for a T alpha R-3/4 thin disk temperature profile. There is no strong correlation between the direction of motion (peculiar velocity) of the lens galaxy and the orientation of the disk.
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