Fig. 12

Filled histograms showing the normalised distributions of projected distances to the closest luminous galaxy in the 2MRS catalogue for quiescent and all star-forming dwarfs. The width of each histogram indicates the corresponding poisson uncertainty. It is clear that star-forming dwarfs are preferentially found at distances ~1 Mpc from their hosts, while quiescent dwarfs almost never reach such large separations and generally concentrate in the inner ~100–200
kpc. The solid curve shows the fraction of star-forming galaxies at each galactocentric distance, with dashed lines indicating the 95% binomial uncertainty interval. Star-forming dwarfs absolutely dominate for distances ≳ 400
kpc. Their abundance starts to noticeably decline at smaller projected distances, but they remain dominant down to separations as small as
kpc – where quiescent dwarfs take over.
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