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- W3100986873 abstract "Optical and near-IR Hubble Space Telescope and Gemini North adaptive optics images, further improved through deconvolution, are used to explore the gravitationally lensed radio source PKS 1830-211. The line of sight to the quasar at z = 2.507 appears to be very busy, with the presence, within 05 from the source, of (1) a possible galactic main-sequence star, (2) a faint red lensing galaxy visible only in H band, and (3) a new object whose colors and morphology match those of an almost face-on spiral. The V-I color and faint I magnitude of the latter suggest that it is associated with the molecular absorber seen toward PKS 1830-211, at z = 0.89 rather than with the z = 0.19 H I absorber previously reported in the spectrum of PKS 1830-211. While this discovery might ease the interpretation of the observed absorption lines, it also complicates the modeling of the lensing potential well, hence decreasing the interest in using this system as a means to measure H0 through the time delay between the lensed images. This is the first case of a quasar lensed by an almost face-on spiral galaxy." @default.
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- W3100986873 date "2002-08-10" @default.
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- W3100986873 title "Cosmic Alignment toward the Radio Einstein Ring PKS 1830−211?" @default.
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