Substructure: Clues to the Formation of Clusters of Galaxies

Details Substructure: Clues to the Formation of Clusters of Galaxies Substructure: Clues to the Formation of Clusters of Galaxies

1995-07-26

arxiv.org/abs/astro-ph/9507107v1

Astrophys.J. 451 (1995) L5

Astronomy and Astrophysics

Astrophysics

7 pages, uuencoded compressed postscript. To appear in ApJ Letters (September 20, 1995 issue)

Scientific paper

10.1086/309673

We have examined the spatial distribution of substructure in clusters of galaxies using Einstein X-ray observations. Subclusters are found to have a markedly anisotropic distribution that reflects the surrounding matter distribution on supercluster scales. Our results suggest a picture in which cluster formation proceeds by mergers of subclusters along large-scale filaments. The implications of such an anisotropic formation process for the shapes, orientations and kinematics of clusters are discussed briefly.

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