Published by
EDP Sciences
EDP Sciences Journals List
Subscriber Authentication Point
Home All issues Volume 392/ 3 Article
Free access
Issue A&A
Volume 392, Number 3, September IV 2002
Page(s) 795 - 805
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20020940



A&A 392, 795-805 (2002)
DOI: 10.1051/0004-6361:20020940

Abell 1451 and 1RXS J131423.6-251521: A multi-wavelength study of two dynamically perturbed clusters of galaxies

I. Valtchanov1, T. Murphy2, M. Pierre1, R. Hunstead2 and L. Lémonon1

1  CEA/DSM/DAPNIA, Service d'Astrophysique, 91191 Gif-sur-Yvette, France
2  School of Physics, University of Sydney, NSW 2006, Australia

(Received 9 April 2002 / Accepted 20 June 2002)

Abstract
We present results from optical, X-ray and radio observations of two X-ray bright ( $L_{\rm X} \sim 10^{45}$ erg s -1) galaxy clusters. Abell 1451 is at redshift z=0.1989 and has line-of-sight velocity dispersion $\sigma_{\rm v} = 1330$ km s -1 as measured from 57 cluster galaxies. It has regular X-ray emission without signs of substructure, a Gaussian velocity distribution, lack of a cooling flow region and significant deviations from the observed scaling laws between luminosity, temperature and velocity dispersion, indicating a possible merging shock. There is only one spectroscopically confirmed cluster radio galaxy, which is close to the X-ray peak. 1RXS J131423.6-251521 (for short RXJ1314-25) has z=0.2474 and $\sigma_{\rm v} = 1100$ km s -1 from 37 galaxies. There are two distinct galaxy groups with a projected separation of $\approx$700 kpc. The velocity histogram is bi-modal with a redshift-space separation of ~1700 km s -1, and the X-ray emission is double peaked. Although there are no spectroscopically confirmed cluster radio galaxies, we have identified a plausible relic source candidate.


Key words: galaxies: clusters: individual: Abell 1451, 1RXS J131423.6-251521 -- X-rays: galaxies -- radio lines: galaxies -- galaxies: distances and redshifts -- galaxies: clusters: general

Offprint request: I. Valtchanov, ivaltchanov@cea.fr

SIMBAD Objects in preparation



© ESO 2002

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.