Our conception of galaxy evolution inside clusters have recently changed due to an increasing evidence suggesting a pre-processing of galaxies at moderate densities. Based on the high frequency of interacting systems found at intermediate densities, we use the SDSS-DR4 data to analyse the role of close galaxy interactions as environmental

It is foreseen that in the near future we will be able to measure the light from extrasolar planets similar to the Earth. When these data become available, a truly interdisciplinary approach to their analysis will be necessary in order to understand the physical properties of these worlds based on globally-averaged measurements. In this task

Context. The Tully-Fisher relation represents a connection between fundamental galaxy parameters, such as its total mass and the mass locked in stars. Therefore, the study of the evolution of this relation in the optical and infrared bands can provide valuable information about the evolution of the individual galaxies through the changes found in

We define blue E/S0 galaxies as objects having a clear early-type morphology on the HST/ACS images but with a blue rest-frame color. We isolate this way 210 IAB 22 blue early-type galaxies with M* / Msun > 1010 in the COSMOS field located in three redshift bins (0.2 z 0.55, 0.55 z 0.8, 0.8 z 1.4) and study their properties (number density

We present preliminary results of our HI WSRT observations of early-type galaxies in the ATLAS3D sample. We discuss the dependence of HI properties on environment. We detect HI in about half of the galaxies outside the Virgo cluster. The HI morphology/kinematics changes as a function of environment, going from regular, rotating systems around

We report on RXTE observations of the neutron star transient currently active in Terzan 5 (also known as IGR J17480-2446; ATels #2919, #2920, #2922, #2924, #2929, #2932, #2933, #2937, #2939, #2940, #2946), which has recently turned into a Z source (Altamirano et al., ATel #2952). The X-ray burst rate has increased gradually (see also ATels #2939,