S4G: The Spitzer Survey of Stellar Structure in Galaxies
Galaxies are the basic building blocks of the Universe, and understanding their formation and evolution is crucial to many areas of current astrophysical...
The last years saw numerous detections of substructure in the Galactic halo, largely due to wide area surveys like the Sloan Digital Sky Survey (SDSS) or the...
Searching for Tidal Remnants in the Milky Way: Photometric Survey of Globular Clusters
The picture of building the Milky Way halo from the merger of protogalactic fragments is considered the local manifestation of the hierarchical galaxy formation...
Shedding light on the darkest galaxies: the Local Group dwarfs
Crucial issues in cosmology and astrophysics are to understand the process of galaxy formation and evolution and the nature of what appears to be the dominant...
The first galaxies are thought to have started the reionization of the Universe, that is the transformation of the cosmic hydrogen from its initial neutral to...
Solved: the mystery of how dark matter in galaxies is distributed
The gravitational force in the Universe under which it has evolved from a state almost uniform at the Big Bang until now, when matter is concentrated in...
Star Formation Histories of Ultra-faint Dwarf Galaxies: Environmental Differences between Magellanic and Non-Magellanic Satellites?
We present the color-magnitude diagrams and star formation histories (SFHs) of seven ultra-faint dwarf galaxies: Horologium 1, Hydra 2, Phoenix 2, Reticulum 2...
Star formation modes and population gradients in simulated dwarf galaxies
Today we largely understand the large scale evolution of the Universe but we have only little knowledge of the small scale physics involved in forming and...
The immediate surroundings of our Milky Way galaxy are home to a number of dwarf galaxies, whose variety in shape, size, spatial location and velocity tells us...