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Recent observations suggest that dwarf galaxies pervade the universe, for they have been encountered in large numbers in all the environments. However, we present evidence that suggests dwarf galaxies may be subject to strong dynamical processes in high density environments, the combined effects of multiple encounters and the tidal effects due to the potential well of rich clusters could result in the effective disruption of dwarf galaxies in the clusters central regions. Alternatively, the lack of dwarf galaxies in rich environments has been interpreted in terms of a density-morphology relation: dwarf galaxies prefer low density environments (Phillipps et al. 1998). We argue that such an explanation cannot account for the relationship between the cD halo luminosity and the gas mass in the ICM, whereas the dwarf disruption scenario proposed by Lopez-Cruz et al. (1997) addresses this naturally.
Rich superclusters are the ideal environment for the detection of cluster mergings, because the high peculiar velocities induced by the enhanced local density of the large-scale structure favour the cluster-cluster collisions, in the same way as seen
We present the properties of the globular clusters (GCs) and nuclear star clusters (NSCs) of low-mass ($10^{5.5}<M_star<10^{8.5}$ $M_odot$) early-type satellites of Milky Way-like and small group hosts in the Local Volume (LV) using deep, ground-base
We develop a simple analytical criterion to investigate the role of the environment on the onset of star formation. We will consider the main external agents that influence the star formation (i.e. ram pressure, tidal interaction, Rayleigh-Taylor and
Data are presently available on the luminosities and half-light radii of 101 globular clusters associated with low-luminosity parent galaxies. The luminosity distribution of globulars embedded in dwarf galaxies having $M_{v} > -16$ is found to differ
We investigate whether the large scale structure environment of galaxy clusters imprints a selection bias on Sunyaev Zeldovich (SZ) catalogs. Such a selection effect might be caused by line of sight (LoS) structures that add to the SZ signal or conta