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Spatial distribution of stars and brown dwarfs in sigma Orionis
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Discs of planetary-mass objects in σ Orionis
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The substellar mass function in σ Orionis II.: Optical, near-infrared and IRAC/Spitzer photometry of young cluster brown dwarfs and planetary-mass objects
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The brightest stars of the σ Orionis cluster
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Are isolated planetary-mass objects really isolated?: A brown dwarf-exoplanet system candidate in the σ Orionis cluster
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Kinematic structure in the young σ Orionis association
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The Two Micron All Sky Survey (2MASS)
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The nearest young moving groups
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Membership, binarity and accretion among very low-mass stars and brown dwarfs of the sigma Orionis cluster
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XMM-Newton observations of the σ Ori cluster -: I.: The complex RGS spectrum of the hot star σ Ori AB
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Chemical abundances in the secondary star in the black hole binary A0620-00
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Photometric identification of the low-mass population of Orion OB1b.: I.: The σ Orionis cluster
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Spectroscopic estimate of surface gravity for a planetary member in the σ Orionis cluster
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Spectral irradiance calibration in the infrared. XIV. The absolute calibration of 2MASS
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Accretion in young stellar/substellar objects
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Classification of a selected sample of weak T Tauri stars
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A methane, isolated, planetary-mass object in Orion
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Discovery of a very cool object with extraordinarily strong Hα emission
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Activity at the deuterium-burning mass limit in Orion
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No disks around low-mass stars and brown dwarfs in the young σ Orionis cluster?
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Lithium and H alpha in stars and brown dwarfs of sigma Orionis
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Optical spectroscopy of isolated planetary mass objects in the σ Orionis cluster
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Keck NIRC observations of planetary-mass candidate members in the σ Orionis open cluster
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Light-element abundance patterns in the Orion association.: I.: Hubble Space Telescope observations of boron in G dwarfs
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Discovery of young, isolated planetary mass objects in the σ Orionis star cluster
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