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• W2059704500 abstract "We use spectra of the double lensed quasars HE0047-1756 and SDSS1155+6346 to study their unresolved structure through the impact of microlensing. There is no significant evidence of microlensing in the emission line profiles except for the Ly$alpha$ line of SDSS1155+6346, which shows strong differences in the shapes for images A and B. However, the continuum of the B image spectrum in SDSS1155+6346 is strongly contaminated by the lens galaxy and these differences should be considered with caution. Using the flux ratios of the emission lines for image pairs as a baseline to remove macro-magnification and extinction, we have detected strong chromatic microlensing in the continuum measured by CASTLES (http://www.cfa.harvard.edu/castles/), in both lens systems, with amplitudes $0.09 (lambda 16000) lesssim |Delta m |lesssim 0.8 (lambda 5439)$ for HE0047-1756, and $0.2 (lambda 16000) lesssim |Delta m |lesssim 0.8 (lambda 5439)$ for SDSS1155+6346. Using magnification maps to simulate microlensing, and modeling the accretion disk as a Gaussian source (I $propto$ exp(-R$^{2}$/2r$^2_s$)) of size r$_{s}$ $propto$ $ lambda^{p} $ we find, r$_{s}$ = 2.5$_{-1.4}^{+3.0}$ $sqrt{M/0.3M_{odot}}$ light days and p = 2.3 $pm$ 0.8, at the rest frame for $lambda$ = 2045, for HE0047-1756 (log prior), and r$_{s}$ = 5.5$_{-3.3}^{+8.2}$ $sqrt{M/0.3M_{odot}}$ light days and p = 1.5 $pm$ 0.6 at the rest frame of $lambda$ = 1398, for SDSS1155+6346 (log prior). Contrary to other studied lens systems, the chromaticity detected in HE0047-1756 and SDSS1155+6346 is large enough to fulfill the thin disk prediction. The inferred sizes, however, are very large compared to the predictions of this model, especially in the case of SDSS1155+6346." @default.
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• W2059704500 date "2014-11-24" @default.
• W2059704500 modified "2023-09-26" @default.
• W2059704500 title "STRONG CHROMATIC MICROLENSING IN HE0047–1756 AND SDSS1155+6346" @default.
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• W2059704500 doi "https://doi.org/10.1088/0004-637x/797/1/61" @default.
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