Using a large compilation of massive (stellar mass M≥10^{11} M_&sun;) earlytype galaxies (ETGs), we have probed, up to z˜1, whether the presence of satellites within a projected distance of 100 kpc of these objects depends on the size of the host massive galaxies. We do not find any evidence for satellites with a mass ratio down to 1:10 neither

Aimed at understanding the evolution of galaxies in clusters, the GLACE survey is mapping a set of key optical lines in several galaxy clusters at z~0.40, 0.63 and 0.85, using the Tunable Filters (TF) of the OSIRIS instrument. This study will address key questions about the physical processes acting upon the infalling galaxies during the course of

We have studied the main evolutionary paths among the galaxy types residing on the massive end of the Red Sequence and nearby locations on the Green Valley during the last ~9 Gyr. The morphological and star formation properties of a sample of these galaxies at 0.3 5×10^10 M_⊙ have been analysed. We present direct observational evidence for the

Massive galaxies experienced an enormous structural evolution in the last ten billion years. The most viable explanation is that massive galaxies have undergone a significant number of minor mergers which have deposited most of their material in the outer regions of the massive galaxies. This scenario is still far from be observationally proved

Context. Most semi-empirical static one-dimensional (1D) models of the solar atmosphere in the magnetically quiet Sun (QS) predict an increase in temperature at chromospheric layers. Numerical simulations of the solar chromosphere with a variable degree of sophistication, i.e. from 1D to three-dimensional (3D) simulations; assuming local thermal

We present the discovery of 17 low-mass white dwarfs (WDs) in short-period (P