An S-shaped arc in the galaxy cluster RXJ0054.0-2823
Abstract
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.
Keywords
Cite
@article{arxiv.astro-ph/0610008,
title = {An S-shaped arc in the galaxy cluster RXJ0054.0-2823},
author = {C. Faure and E. Giraud and J. Melnick and H. Quintana and F. Selman and J. Wambsganss},
journal= {arXiv preprint arXiv:astro-ph/0610008},
year = {2009}
}
Comments
6 pages, accepted for publication in A&A