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GTC Osiris spectroscopic identification of a faint L subdwarf in the UKIRT Infrared Deep Sky Survey
N. Lodieu, M. R. Zapatero Osorio, E. L. Martin +2
We present the discovery of an L subdwarf in 234 square degrees common to the UK Infrared Telescope (UKIRT) Infrared Deep Sky Survey Large Area Survey Data Release 2 and the Sloan…
Brown Dwarf Disks at Ages of 5-10 Myr
B. Riaz, N. Lodieu, J. E. Gizis
We present Spitzer/IRAC and MIPS 24mu archival observations for 28 brown dwarfs in the Upper Scorpius (UppSco) region. We find a disk fraction of 10.7%^(+8.7%)_(-3.3%). One object…
A census of very-low-mass stars and brown dwarfs in the sigma Orionis cluster
N. Lodieu, M. R. Zapatero Osorio, R. Rebolo +2
(ABRIDGED) We have analysed the near-infrared photometric data from the Fourth Data Release (DR4) of the UKIRT Infrared Deep Sky Suvey (UKIDSS) Galactic Clusters Survey (GCS) to de…
Two distant brown dwarfs in the UKIRT Infrared Deep Sky Survey Deep Extragalactic Survey Data Release 2
N. Lodieu, P. D. Dobbie, N. R. Deacon +2
We present the discovery of two brown dwarfs in the UKIRT Infrared Deep Sky Survey (UKIDSS) Deep Extragalactic Survey (DXS) Data Release 2. Both objects were selected photometrical…