We present results from an investigation of the peculiar "Tadpole Galaxy" (UGC 10214) using mid-infrared imaging from the Spitzer Wide-area Infrared Extragalactic Survey (SWIRE) observations of the ELAIS N1 region, which includes UGC10214 and its local environment. The Spitzer imaging data comprise the four mid-infrared channels of IRAC and the 24

We present results on the star formation history of the Local Group dSph galaxy Leo I, obtained through the analysis of its deep HST color-magnitude diagram (CMD) using model CMDs computed from stellar evolutionary models. Our results show unambiguously that Leo I experienced a major increase of its star formation rate from about 6 Gyr ago to 2 Gyr

The synthetic color-magnitude diagram (CMD) methodology to study the star formation history (SFH) of nearby galaxies is briefly reviewed. Firstly the most significant features of the CMD for this task are discussed. Then, the procedure of computing synthetic CMDs is explained and the main results obtained by our group in the last few years

The fragile and rare isotope 6Li has a spallative origin. It is rapidly destroyed in solar-type stars while fully preserved in low-mass brown dwarfs and planets. So far, 6Li has been unambigiously detected in only few metal-poor halo and disk stars whereas it has never been observed with a high level of confidence in any metal-rich or even solar

We present a general analytical formalism to calculate accurately several statistics related to underdense regions in the Universe. The statistics are computed for dark matter halo and galaxy distributions both in real space and redshift space at any redshift. Using this formalism, we found that void statistics for galaxy distributions can be

We present an overview and a brief report on the status of the STELLA project (abbreviation for STELLar Activity). The STELLA-I telescope will be the first robotic telescope that feeds a bench-mounted high-resolution Echelle spectrograph with a set of 50 and 100 μm fibres and provides spectral resolutions of up to 47,000 with a 1 arcsec slit. The