We studied the stellar populations of Fornax dwarf spheroidal galaxy using HST/WFPC2 imaging of 7 galaxy fields. Our observations reach the oldest main-sequence...

We report on an ongoing study of disk galaxy merger simulations and their implications for the Fundamental Plane (FP) of elliptical galaxies.

Star formation in massive clusters proceeds under the influence of the intense ionizing flux emitted by OB stars. Among the massive star forming regions in our...

Most of our knowledge on young stars comes from snapshot observations: spectra and images taken at a single epoch, or at different epochs at different...

Not Available

Structural analysis of S0-Sbc galaxies imaged with HST at near-infrared wavelengths shows many nuclei to be flattened systems with surface brightness comparable...

Chemical abundance data for the Galaxy show a wide dispersion. We try to check if this dispersion may also be found with chemical evolution models as an effect...

We are uncovering significant optical variability in low/hard state observations of several X-ray binaries on the fastest time-scales of just tens of...

Detailed studies of nearby Local Group galaxies offer an unique window to understanding galaxy formation and evolution. The analysis of Colour-Magnitude...