The Principal Axis of the Virgo Cluster

Details The Principal Axis of the Virgo Cluster The Principal Axis of the Virgo Cluster

2000-08-30

arxiv.org/abs/astro-ph/0008470v1

Astronomy and Astrophysics

Astrophysics

8 pages, 4 figures, accepted for publication in ApJ Letters

Scientific paper

10.1086/318177

Using accurate distances to individual Virgo cluster galaxies obtained by the method of Surface Brightness Fluctuations, we show that Virgo's brightest ellipticals have a remarkably collinear arrangement in three dimensions. This axis, which is inclined by 10 to 15 degrees from the line of sight, can be traced to even larger scales where it appears to join a filamentary bridge of galaxies connecting Virgo to the rich cluster Abell 1367. The orientations of individual Virgo ellipticals also show some tendency to be aligned with the cluster axis, as does the jet of the supergiant elliptical M87. These results suggest that the formation of the Virgo cluster, and its brightest member galaxies, have been driven by infall of material along the Virgo-A1367 filament.

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