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• W1726383791 abstract "We have analyzed the observed image separations of the gravitationally lensed images of quasars (QSOs) for a possible correlation with the source redshift. Contrary to the previously noted anticorrelation based on a smaller data set, no correlation is found for the currently available data. We have calculated the average image separations of the lensed QSOs as a function of source redshifts for isothermal spheres with cores in a flat universe, taking into account the amplification bias caused by lensing. The shape of the distribution of the average image separation as a function of redshift is very robust and is insensitive to most model parameters. Observations are found to be roughly consistent with the theoretical results for models that assume the lens distribution to be (1) a Schechter luminosity function that, however, cannot produce images with large separation and (2) mass condensations in a cold dark matter universe, as given by the Press-Schechter theory if an upper limit of 1 × 1013-7 × 1013 M☉ is assumed on the mass of the condensations." @default.
• W1726383791 created "2016-06-24" @default.
• W1726383791 creator A5065750688 @default.
• W1726383791 date "2001-03-20" @default.
• W1726383791 modified "2023-09-27" @default.
• W1726383791 title "Angular Separations of Lensed Quasar Images" @default.
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• W1726383791 doi "https://doi.org/10.1086/319712" @default.
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