We present the results of the dynamical analysis of the rich, hot, and X–ray very luminous galaxy cluster A2219, containing a powerful diffuse radio–halo. Our analysis is based on new redshift data for 27 galaxies in the cluster region, measured from spectra obtained at the TNG, with the addition of other 105 galaxies recovered from reduction of CFHT archive data in a cluster region of ∼ 5 radi...

Most myosins have a positively charged loop 2 with a cluster of lysine residues that bind to the negatively charged N-terminal segment of actin. However, the net charge of loop 2 of very fast Chara myosin is zero and there is no lysine cluster in it. In contrast, Chara myosin has a highly positively charged loop 3. To elucidate the role of these unique surface loops of Chara myosin in its high ...

We report the results of spatially resolved X-ray spectroscopy of 8 different ASCA pointings distributed symmetrically around the center of the Perseus cluster. The outer region of the intracluster gas is roughly isothermal, with temperature ∼ 6–7 keV, and metal abundance ∼ 0.3 Solar. Spectral analysis of the central pointing is consistent with the presence of a cooling flow and a central metal...

Pickup of several molecules, H(2)O, HBr, and CH(3)OH, and Ar atoms on free Ar(N) clusters has been investigated in a molecular beam experiment. The pickup cross sections of the clusters with known mean sizes, Ñ≈ 150 and 260 were measured by two independent methods: (i) the cluster beam velocity decrease due to the momentum transfer of the picked up molecules to the clusters, and (ii) Poisson di...

The Abell 1689 galaxy cluster has recently become a subject of intensive study. Thanks to its intermediate redshift (z = 0.183) its mass distribution can be reconstructed using numerous methods including gravitational lensing, galaxy kinematics and Xray imaging. The methods used to yield conflicting mass estimates in the past and recently the cluster mass distribution has been claimed to be in ...

We have obtained deep, long-slit spectroscopy along the major axis of NGC 6166, the cD galaxy in the cluster Abell 2199, in order to measure the kinematics of intracluster starlight at large radii. The velocity dispersion initially decreases from the central value of 300 km s, to 200 km s within a few kpc, and then steadily rises to 660 km sat a radius of 60 kpc (H0=75 km s Mpc, Ωm=0.3, ΩΛ=0.7)...

We present indications of rotation in the galaxy cluster A2107 by a method that searches for the maximum gradient in the velocity field in a flat disk-like model of a cluster. Galaxies from cumulative sub-samples containing more and more distant members from the cluster centre, are projected onto an axis passing through the centre and we apply a linear regression model on the projected distance...

We report on the discovery of the z = 1.016 cluster RzCS 052 using a modified red sequence method, followup spectroscopy and X-ray imaging. This cluster has a velocity dispersion of 710 ± 150 km s, a virial mass of 4.0 × 10 M⊙ (based on 21 spectroscopically confirmed members) and an X-ray luminosity of (0.68± 0.47)× 10 ergs s in the [1-4] keV band. This optically selected cluster appears to be ...

We have identified a complex galaxy cluster system in the COSMOS field via a wide angle tail (WAT) radio galaxy consistent with the idea that WAT galaxies can be used as tracers of clusters. The WAT galaxy, CWAT-01, is coincident with an elliptical galaxy resolved in the HST-ACS image. Using the COSMOS multiwavelength data set, we derive the radio properties of CWAT-01 and use the optical and X...