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...
The 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...