A multi-wavelength analysis of the cluster of galaxies ABCG 194

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dc.creatorNikogossyan, Elena
dc.creatorDurret, Florence
dc.creatorGerbal, Daniel
dc.creatorMagnard, Frederic
dc.date1999-07-29
dc.date.accessioned2026-07-07T02:32:40Z
dc.date.available2026-07-07T02:32:40Z
dc.description(Abridged) We present a morphological and structural analysis of the Richness zero cluster ABCG 194, known as a ``linear cluster'', based on a catalogue of 97 galaxies with B magnitudes and redshifts, a ROSAT PSPC image and radio data. The overall large scale structure is rather smooth and comparable at optical and X-ray wavelengths. The cluster is elongated along PA $\approx 50$; however it appears as ``linear'' when taking into account only galaxies in the very central part (the axial ratio varies from 0.2 in the central region to 0.8 for a larger region). We have obtained the galaxy and X-ray emitting gas density profiles and estimated the X-ray gas and dynamical masses. At smaller scales, the analysis of both positions and velocities reveals the existence of several groups; a main structure with a nearly gaussian velocity distribution is exhibited. The velocity dispersion is small ($σ_{los} $ = 360 \kms). A wavelet analysis of the X-ray image reveals no large scale substructures. Small scale X-ray sources are detected, mainly corresponding to individual galaxies. ABCG 194 is overall a poor and cold relaxed cluster. We compare how its characteristics fit into various correlations found in the literature, but generally for richer/hotter clusters.
dc.descriptionAccepted for publication in Astronomy & Astrophysics
dc.identifierhttps://arxiv.org/abs/astro-ph/9907415
dc.identifierhttp://arxiv.org/abs/astro-ph/9907415
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/14545
dc.subjectAstrophysics
dc.titleA multi-wavelength analysis of the cluster of galaxies ABCG 194
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