Recent studies of the substellar population in the Taurus cloud have revealed a deficit of brown dwarfs compared to the Trapezium cluster population (citealt...
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Publication12 new substellar members in Taurus. Clues for substellar formation models
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PublicationA census of very-low-mass stars and brown dwarfs in the σ Orionis cluster
Context: The knowledge of the initial mass function (IMF) in open clusters constitutes one way of constraining the formation of low-mass stars and brown dwarfs...
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PublicationA comparison of galaxy group luminosity functions from semi-analytic models
Semi-analytic models (SAMs) are currently one of the primary tools with which we model statistically significant ensembles of galaxies. The underlying physical...
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PublicationA Constraint on Brown Dwarf Formation Via Ejection: Radial Variation of the Stellar and Substellar Mass Function of the Young Open Cluster IC 2391
We present the stellar and substellar mass function (MF) of the open cluster IC 2391, plus its radial dependence, and use this to put constraints on the...
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PublicationA Hubble Space Telescope Advanced Camera for Surveys Search for Brown Dwarf Binaries in the Pleiades Open Cluster
We present the results of a high-resolution imaging survey for brown dwarf binaries in the Pleiades open cluster. The observations were carried out with the...
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PublicationA large spectroscopic sample of L and T dwarfs from UKIDSS LAS: peculiar objects, binaries, and space density
We present the spectroscopic analysis of a large sample of late-M, L, and T dwarfs from the United Kingdom Deep Infrared Sky Survey. Using the YJHK photometry...
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TalkA large, multi-epoch H-alpha survey at z=2.23, 1.47, 0.84 & 0.40: the 11Gyr evolution of star-forming galaxies from HiZELS
I will present new deep and wide narrow-band surveys undertaken with UKIRT, Subaru and the VLT; a unique combined effort to select large, robust samples of H...
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PublicationA possible origin of the mass-metallicity relation of galaxies
Observations show that galaxies follow a mass-metallicity relation over a wide range of masses. One currently favoured explanation is that less massive galaxies...
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PublicationA search for substellar members in the Praesepe and σ Orionis clusters
We have conducted deep photometric searches for substellar members of the Praesepe (0.5-1 Gyr) and σ Orionis (3 Myr) star clusters using the Sloan i' and z'...