Star formation in galaxies falling into clusters along supercluster-scale filaments

Scott Porter, Somak Raychaudhury, Kevin Pimbblet

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Abstract

With the help of a statistical parameter derived from optical spectra, we show that the current star formation rate of a galaxy, falling into a cluster along a supercluster filament, is likely to undergo a sudden enhancement before the galaxy reaches the virial radius of the cluster. From a sample of 52 supercluster-scale filaments of galaxies joining a pair of rich clusters of galaxies within the two-degree Field Redshift Survey region, we find a significant enhancement of star formation, within a narrow range between a??2 and 3 h-170 Mpc of the centre of the cluster into which the galaxy is falling.
Original languageEnglish
Pages (from-to)1152 - 1160
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume388
Issue number3
DOIs
Publication statusPublished - 2008
Externally publishedYes

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