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23 papers · 1 filter
USco1621 B and USco1556 B: Two wide companions at the deuterium-burning mass limit in Upper Scorpius
Patricia Chinchilla, Víctor J. S. Béjar, Nicolas Lodieu +6
(Abridged) Our aim is to identify analogues of gas giant planets, as companions at wide separations of very young stars. To identify these objects, we cross correlated the Visible…
Cloud Atlas: Weak color modulations due to rotation in the planetary-mass companion GU Psc b and 11 other brown dwarfs
Ben W. P. Lew, Dániel Apai, Yifan Zhou +10
Among the greatest challenges in understanding ultra-cool brown dwarf and exoplanet atmospheres is the evolution of cloud structure as a function of temperature and gravity. In thi…
Spectral library of age-benchmark low-mass stars and brown dwarfs
E. Manjavacas, N. Lodieu, V. J. S. Béjar +3
In the past years, some extremely red brown dwarfs were found. They were believed to have low surface gravity, but many of their spectral characteristics were similar to those of h…
MUSE Analysis of Gas around Galaxies (MAGG) -- I: Survey design and the environment of a near pristine gas cloud at z~3.5
Emma K. Lofthouse, Michele Fumagalli, Matteo Fossati +9
We present the design, methods, and first results of the MUSE Analysis of Gas around Galaxies (MAGG) survey, a large programme on the Multi Unit Spectroscopic Explorer (MUSE) instr…
An Extremely Massive Quiescent Galaxy at : Evidence of Insufficiently Rapid Quenching Mechanisms in Theoretical Models
Ben Forrest, Marianna Annunziatella, Gillian Wilson +17
We present spectra of the most massive quiescent galaxy yet discovered at , spectroscopically confirmed via the detection of Balmer absorption features in the and ban…
A new take on the low-mass brown dwarf companions on wide-orbits in Upper-Scorpius
Simon Petrus, Mickaël Bonnefoy, Gaël Chauvin +10
The Upper-Scorpius association (5-11 Myr) contains a unique population of low-mass (M<30 MJup) brown-dwarfs. The detailed relative characterization of their physical properties (ma…