%0 Journal Article
%T An S-shaped arc in the galaxy cluster RX J0054.0-2823
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%A Faure, C.
%A Giraud, E.
%A Melnick, J.
%A Quintana, H.
%A Selman, F.
%A Wambsganss, J.
%Z 6 pages, accepted for publication in A&A
%< avec comité de lecture
%@ 0004-6361
%J Astronomy and Astrophysics - A&A
%I EDP Sciences
%V 463
%P 833-837
%8 2007
%D 2007
%Z astro-ph/0610008
%Z 2007A&A...463..833F
%R 10.1051/0004-6361:20065045
%K cosmology: observations
%K galaxies: clusters: individual: RX J0054.0-2823
%K galaxies: interactions
%K galaxies: halos
%K gravitational lensing
%Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles
%X The center of the galaxy cluster RX J0054.0-2823 at z = 0.292 is a dynamically active region which includes an interacting system of three galaxies surrounded by a large halo of intra-cluster light. We report here the discovery of an S-shaped feature of total length 11 arcsec in the central region of this cluster and discuss its physical nature. We test the gravitational lensing assumption by doing a mass modelling of the central part of the galaxy cluster. We very naturally reproduce position and form of this S-shape feature as a gravitationally lensed background object at redshift between 0.5 and 1.0. We conclude that the lensing nature is the very probable explanation for this S-shaped arc; the ultimate proof will be the spectroscopic confirmation by measuring the high redshift of this elongated feature with surface brightness V~24mag/arcsec2.
%G English
%L in2p3-00135961
%U https://hal.in2p3.fr/in2p3-00135961
%~ IN2P3
%~ LPTA
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2