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Kolektiv Miklošičeve knjižnice - FPNM
  • Strong and weak lensing united : the cluster mass distribution of the most X-ray luminous cluster RX J1347-1145
    Bradač, Maruša
    Weak gravitational lensing is one of the most powerful tools to study the mass and the mass distribution of galaxy clusters. However, the mass-sheet degeneracy transformation has limited its success. ... We present a novel method for a cluster mass reconstruction, which combines weak and strong lensing information on common scales and can as a consequence break the mass-sheet degeneracy. We apply the method to ground-based high-quality multi-colour data of RX J1347-1145, the most X-ray luminous cluster to date. The very deep multi-colour data analysis reveals many additional arc candidates in addition to what was previously known for this cluster. The combined strong and weak lensing reconstruction confirms that the cluster is indeed very massive. If the redshift and identification of the multiple-image system as well as the photometric redshift estimates of the source galaxies used for weak lensing are correct, the projected enclosed cluster mass is ▫$M(\le 360 h^{-1} kpc) = (1.2 +_ 0.3) X 10^{15} M\odot$▫. With higher resolution (e. g. HST imaging data) more reliable multiple imaging information can be obtained and the reconstruction can be improved to accuracies greater than what is currently possible with weak or strong lensing techniques.
    Vir: Proceedings of science [Elektronski vir]. - ISSN 1824-8039 (2004, str. [1]-4)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2004
    Jezik - angleški
    COBISS.SI-ID - 15973640

    Povezava(-e):

    http://pos.sissa.it//archive/conferences/014/014/BDMH2004_014.pdf

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