Redshift survey between A548 and A3367 (Andreuzzi+, 1998)

Details Redshift survey between A548 and A3367 (Andreuzzi+, 1998) Redshift survey between A548 and A3367 (Andreuzzi+, 1998)

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat..33370017a&link_type=abstract

VizieR On-line Data Catalog: J/A+A/337/17. Originally published in: 1998A&A...337...17A

Computer Science

Clusters: Galaxy, Redshifts

Scientific paper

In this paper we present the results of a spectroscopic survey of galaxies in an area between the two clusters of galaxies A548 and A3367, suspected to be a close and interacting pair. With the use of multifiber spectroscopy, we measured 180 new velocities of galaxies in the central part of A 3367 and in the external regions of A 548. The redshift histogram shows the presence of three velocity peaks, at v~12000km/s, v~30000km/s and v~40000km/s, respectively. For these we estimate the density excess, the mean velocity, and the velocity dispersion. The first clump corresponds to an elongation of A 548: in particular we found a correspondence between the features of this peak and the substructures of A 548. The second peak has a velocity dispersion which is typical of clusters and the distribution of its members on the plane of the sky corresponds to the highest density peak in A 3367. We therefore suggest that the name A 3367 has to be attributed to this clump. Our general conclusion is that, differently from expected, A 548 and A 3367 do not form a close pair of merging clusters, since the two structures are at significantly different redshifts. Moreover, we found that the complex dynamical structure of A 548 has large coherence, with a projected extension in the range of 1-3h-1Mpc.
(1 data file).

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