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2004MNRAS.351.1439S - Mon. Not. R. Astron. Soc., 351, 1439-1456 (2004/July-2)
XMM-Newton observations of the binary cluster system Abell 399/401.
SAKELLIOU I. and PONMAN T.J.
Abstract (from CDS):
Although tidal or compression effects might affect the large-scale structure of the two clusters, we show that these cannot account for the distortions seen in the inner regions. We argue that the reasonably relaxed morphology of the clusters, and the absence of major temperature anomalies, argues against models in which the two have already experienced a close encounter. The properties of the intermediate region suggests that they are at an early stage of merging, and are currently interacting mildly, because their separation is still too large for more dramatic effects. The substructure we find in their inner regions seems to point to their individual merging histories. It seems likely that in the Abell 399/401 system, we are witnessing two merger remnants, just before they merge together to form a single rich cluster of galaxies. This picture is consistent with recent numerical simulations of cluster formation.
Abstract Copyright: 2004 RAS
Journal keyword(s): galaxies: clusters: individual: Abell 399 - galaxies: clusters: individual: Abell 401 - intergalactic medium - X-rays: galaxies: clusters
Simbad objects: 5
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