Using the DIANOGA hydrodynamical zoom-in simulation set of galaxy clusters, we analyze dynamics traced by stars belonging to Brightest Cluster Galaxies (BCGs) and their surrounding diffuse component, forming intracluster light (ICL), compare it dark matter galaxies identified in simulations. We compute scaling relations between BCG cluster velocity dispersions corresponding masses (i.e. $M_\mat...

We investigate a kinematic scaling relation between the baryonic mass and flat velocity dispersion, i.e. mass-velocity dispersion (MVDR), from brightest cluster galaxies (BCGs) to galaxy clusters. In our studies, of BCGs is mainly estimated by photometry. The profiles are explored with integrated field unit (IFU) Mapping Nearby Galaxies at Apache Point Observatory (MaNGA). For first time, we re...

We study the use of red sequence selected galaxy spectroscopy for unbiased estimation of galaxy cluster masses. We use the publicly available galaxy catalog produced using the semi-analytic model of De Lucia & Blaizot (2007) on the Millenium Simulation (Springel et al. 2005). We make mock observations to mimic the selection of the galaxy sample, the interloper rejection and the dispersion measu...

a wireless sensor network consists of many inexpensive sensor nodes that can be used toconfidently extract data from the environment .nodes are organized into clusters and in each cluster all non-cluster nodes transmit their data only to the cluster-head .the cluster-head transmits all received data to the base station .because of energy limitation in sensor nodes and energy reduction in each d...

We investigate the rms peculiar velocity of galaxy clusters in the Lambda cold dark matter (ΛCDM) and tau cold dark matter (τCDM) cosmological models using N-body simulations. Cluster velocities for different cluster masses and radii are examined. To identify clusters in the simulations we use two methods: the standard friends-offriends (FOF) method and the method, where the clusters are define...

Several recent numerical simulations of off-center cluster mergers predict that significant angular momentum with associated velocities of a few ×10 km s can be imparted to the resulting cluster. Such gas bulk velocities can be detected by the Doppler shift of X-ray spectral lines with ASCA spectrometers. Using two ASCA observations of the Centaurus cluster (Abell 3526), we produced a velocity ...

We measure the two–point redshift–space correlation function of loose groups of galaxies, ξGG(s) , for the combined CfA2 and SSRS2 surveys. Our combined group catalog constitutes the largest homogeneous sample available (885 groups). We compare ξGG(s) with the correlation function of galaxies, ξgg(s) , in the same volume. We find that groups are significantly more clustered than galaxies: < ξGG...

We report the determination of high-accuracy radial velocities for 299 members of the globular cluster M92 using the Hydra multi-object spectrograph on the WIYN telescope. We have concentrated on stars outside of the central region of the cluster, located up to 14. ′ 4 from the cluster center. Candidate members were selected for spectroscopy based on a photometric metallicity index determined f...