Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-12-13
Mon.Not.Roy.Astron.Soc.375:1409-1417,2007
Astronomy and Astrophysics
Astrophysics
10 pages, 9 figures; accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2006.11406.x
We investigate the variation of current star formation in galaxies as a function of distance along three supercluster filaments, each joining pairs of rich clusters, in the Pisces-Cetus supercluster, which is part of the 2dFGRS. We find that even though there is a steady decline in the rate of star formation, as well as in the fraction of star forming galaxies, as one approaches the core of a cluster at an extremity of such a filament, there is an increased activity of star formation in a narrow distance range between 3-4/h_70 Mpc, which is 1.5-2 times the virial radius of the clusters involved. This peak in star formation is seen to be entirely due to the dwarf galaxies (-20
Porter Scott C.
Raychaudhury Somak
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