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...
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PublicationThe Substellar Population in the Young σ Orionis Cluster, Spatial Distribution
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PublicationThe Substellar Population in σ Orionis
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...
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PublicationThe 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...
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PublicationThe 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...
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PublicationThe 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...
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PublicationThe 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...
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PublicationThe Sun and the Solar System
High-resolution observations provide evidence of the existence of small-amplitude transverse oscillations in solar filament fine structures. These oscillations...
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PublicationThe Sun as a Star: Background, Intensity and Velocity, Power Spectra and Convection
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PublicationThe Sun at high resolution: first results from the Sunrise mission
The Sunrise balloon-borne solar observatory consists of a 1m aperture Gregory telescope, a UV filter imager, an imaging vector polarimeter, an image...