Context. Studies of the mass function (MF) of open clusters of different ages allow us to probe the efficiency with which brown dwarfs evaporate from clusters...
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PublicationThe substellar mass function in the central region of the open cluster Praesepe from deep LBT observations
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PublicationThe Substellar Mass Function in σ Orionis
We combine results from imaging searches for substellar objects in the σ Orionis cluster and follow-up photometric and spectroscopic observations to derive a...
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PublicationThe substellar mass function in σ Orionis. II. Optical, near-infrared and IRAC/Spitzer photometry of young cluster brown dwarfs and planetary-mass objects
Aims:We investigate the mass function in the substellar domain down to a few Jupiter masses in the young σ Orionis open cluster (3±2 Ma, d = 360^+70_-60 pc)...
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PublicationThe Substellar Population of σ Orionis: A Deep Wide Survey
We present a deep I, Z photometric survey covering a total area of 1.12 deg2 of the σ Orionis cluster and reaching completeness magnitudes of I = 22 and Z = 21...
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PublicationThe SUMO project I. A survey of multiple populations in globular clusters
We present a general overview and the first results of the SUMO project (a SUrvey of Multiple pOpulations in Globular Clusters). The objective of this survey is...
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PublicationThe Sunrise Mission
The first science flight of the balloon-borne Sunrise telescope took place in June 2009 from ESRANGE (near Kiruna/Sweden) to Somerset Island in northern Canada...
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PublicationThe Sunyaev-Zeldovich effect in superclusters of galaxies using gasdynamical simulations: the case of Corona Borealis
We study the thermal (tSZ) and kinetic Sunyaev-Zel'dovich (kSZ) effect associated with superclusters of galaxies using the MareNostrum (MNU) universe smoothed...
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PublicationThe Superluminal Source GRS 1915+105: A High Mass X-Ray Binary?
We obtained K-band (2.0--2.5 mu m) infrared spectra of the visually obscured superluminal source GRS 1915+105 at three different epochs of 1995, at times when...
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PublicationThe suppression of star formation by powerful active galactic nuclei
The old, red stars that constitute the bulges of galaxies, and the massive black holes at their centres, are the relics of a period in cosmic history when...