Understanding the Largest Quasar Lens SDSS J1029+2623

Details Understanding the Largest Quasar Lens SDSS J1029+2623 Understanding the Largest Quasar Lens SDSS J1029+2623

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12195o&link_type=abstract

HST Proposal ID #12195. Cycle 18

Physics

Scientific paper

We propose multi-band WFC3/ACS imaging of the unique quasar lens SDSS J1029+2623. It consists of three quasar images at z=2.2 produced by a massive cluster of galaxies at z=0.60. The lens system represents a very rare example of the ``naked cusp'' image configuration, and moreover, the maximum image separation of 22.5'' makes it the largest known quasar lens. We will use the deep WFC3/ACS images to identify many additional multiply-imaged background galaxies, which greatly helps the mass modeling of the central region of the cluster. An accurate mass model is essential to addressing several outstanding questions for this lens, including the anomalous flux ratios between the quasar images and the dynamical state of the lensing cluster. The model will be particularly good because we can combine the strong lensing constraints from HST with our weak lensing measurements on large scales, and also with our deep 60 ksec Chandra X-ray observations.;

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