The Substellar Mass Function in the Central Region of the Open Cluster Praesepe from Deep LBT Observations
Studies of the mass function (MF) of open clusters of different ages allow us to probe the efficiency with which brown dwarfs (BDs) are evaporated from clusters...
The Substellar Population in the Young σ Orionis Cluster, Spatial Distribution
We review different surveys, in the optical and infrared, conducted in the very young (age 1 8 Myr), nearby (d ˜ 350 pc) σ Orionis cluster aimed to characterize...
The σ Orionis cluster (˜3 Myr, 350 pc) is an ideal site to investigate the early evolution of substellar (brown dwarf and planetary mass) objects. To date, the...
The Substellar Population of the σ Orionis Cluster
We present a deep I, Z photometric survey (I compl = 22 mag) covering a total area of 1.12 deg2 in the σ Orionis cluster. Using I, I - Z color-magnitude...
The Subsurface Structure of Sunspots and the Origin of Solar Active Regions
Several topics concerning the subsurface structure and evolution of sunspots are discussed. These include the morphology and stability of the magnetized plasma...
The subsurface structure of sunspots and the origin of solar active regions
Several topics concerning the subsurface structure and evolution of sunspots are discussed. These include the morphology and stability of the magnetized plasma...
The SUMO project: a SUrvey of Multiple pOpulations in globular clusters
We present the first results of the SUMO project, aimed at studying multiple populations in globular clusters. For this purpose we obtained wide-field...
High-resolution observations provide evidence of the existence of small-amplitude transverse oscillations in solar filament fine structures. These oscillations...