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1 results

  • High-precision strong lensing models of galaxy clusters in the JWST era

  • P. Bergamini, C. Grillo, P. Rosati, A. Acebron, E. Vanzella, A. Mercurio, M. Meneghetti, G. Angora, G. Granata, U. Mestric, G. B. Caminha, T. Treu
  • Journal:
    Proceedings of the International Astronomical Union / Volume 18 / Issue S381 / December 2022
    Published online by Cambridge University Press:
    04 March 2024, pp. 71-78
    Print publication:
    December 2022
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  • We present high-precision strong lensing models for the galaxy clusters MACS J0416.1–0403 at z=0.396 and Abell 2744 at z=0.307. The models are constrained by two of the largest data-sets of secure multiple images ever used in lensing. These are identified from the photometric images observed by the Hubble space telescope and JWST in combination with spectroscopic data obtained by the Multi-Unit Spectroscopic Explorer at the Very Large Telescope. The same spectro-photometric data are used to create pure and complete samples of cluster member galaxies. Our models allow an extremely precise estimation of the cluster total mass distribution and produce accurate magnification maps that are fundamental to study the physical properties (mass, size, luminosity, etc.) of the lensed high-redshift galaxies.