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

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)71-78
Number of pages8
JournalProceedings of the International Astronomical Union
Volume18
DOIs
StatePublished - 4 Dec 2022
Externally publishedYes

Keywords

  • Dark Matter
  • Galaxy Cluster
  • Strong Gravitational Lensing

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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