2002/06/24 by I. Valtchanov, T. Murphy, M. Pierre +3 · 1 citation
Physics and Astronomy · #Abell 2744 #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Cluster (spacecraft) #Cooling flow #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Peculiar velocity #Redshift #Velocity dispersion #astro-ph
paper · pdf · doi:10.1051/0004-6361:20020940
published as Astron.Astrophys. 392 (2002) 795 · 16 pages, 12 figures, some in colour; A&A accepted
arxiv created 2002/06/24 · openalex publication_date 2002/09/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present results from optical, X-ray and radio observations of two X-ray bright ( erg s-1) galaxy clusters. Abell 1451 is at redshift and has line-of-sight velocity dispersion 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 and km s-1 from 37 galaxies. There are two distinct galaxy groups with a projected separation of ≈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.