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Discovery of Young, Isolated Planetary Mass Objects in the σ Orionis Star Cluster
We present the discovery by optical and near-infrared imaging of an extremely red, low-luminosity population of isolated objects in the young, nearby stellar cluster around the multiple, massive starExpand
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Discovery of a Young Planetary Mass Companion to the Nearby M Dwarf VHS J125601.92-125723.9
In a search for common proper motion companions using the VISTA Hemisphere Survey (VHS) and the 2MASS catalogs we have identied :5 0:5 and L7 1:5, respectively. The primary shows slightly weakerExpand
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Spectroscopic Classification of Late-M and L Field Dwarfs
We present spectra for 12 new ultracool dwarfs found in the DENIS infrared survey. Seven of them have spectral types at the bottom of the M-class (M8–M9.5), and the other five belong to the coolerExpand
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Discs of planetary-mass objects in $\mathsf{\sigma}$ Orionis
Aims.We searched for infrared flux excesses of planetary-mass candidates in the σ Orionis cluster (~3 Myr, ~350 pc). Methods: Using IJHKs data from the literature and the [3.6], [4.5], [5.8], andExpand
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Observation of enhanced X-ray emission from the CTTS AA Tauri during one transit of an accretion funnel flow
Context. Classical T Tauri stars are young solar-type stars accreting material from their circumstellar disks. Thanks to a favorable inclination of the system, the classical T Tauri star AA TauExpand
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The Monitor project: JW 380 – a 0.26‐, 0.15‐M⊙, pre‐main‐sequence eclipsing binary in the Orion nebula cluster
We report the discovery of a low-mass (0.01M O ) pre-main-sequence (PMS) eclipsing binary (EB) with a 5.3 d orbital period. Expand
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Discovery of a very cool object with extraordinarily strong H$\mathsf{\alpha}$ emission
We report on the finding of the strongest H α emission – pseudoequivalent width of 705 A – known so far in a young, late type dwarf. This object, named as S Ori 71, is a substellar candidate memberExpand
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Lithium depletion in the brown dwarf binary GJ 569Bab
GJ 569Bab is the first brown dwarf binary for which the mass of each component has been derived by solving the astrometric and spectroscopic orbit of the pair, i.e., independently of any theoreticalExpand
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Search for radial velocity variations in eight M-dwarfs with NIRSPEC/Keck II
Context. Radial velocity (RV) measurements from near-infrared spectra have become a potentially powerful tool to search for planets around cool stars and sub-stellar objects. As part of a largeExpand
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