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7 papers · 2 filters
Very Low-Mass Stars and Brown Dwarfs in Upper Scorpius using Gaia DR1: Mass Function, Disks and Kinematics
Neil J. Cook, Aleks Scholz, Ray Jayawardhana
Our understanding of the brown dwarf population in star forming regions is dependent on knowing distances and proper motions, and therefore will be improved through the Gaia space…
SPIRou Input Catalog: Activity, Rotation and Magnetic Field of Cool Dwarfs
C. Moutou, E. M. Hebrard, J. Morin +7
Based on optical high-resolution spectra obtained with CFHT/ESPaDOnS, we present new measurements of activity and magnetic field proxies of 442 low-mass K5-M7 dwarfs. The objects w…
Spot distribution and fast surface evolution on Vega
P. Petit, E. M. Hébrard, T. Böhm +2
Spectral signatures of surface spots were recently discovered from high cadence observations of the A star Vega. We aim at constraining the surface distribution of these photospher…
Abundances in Galactic Bulge planetary nebulae from optical, ultraviolet and infrared observations
Christina L. Smith, Albert A. Zijlstra, Krzysztof M. Gesicki +1
Iron suffers from high levels of depletion in the highly ionized environments of planetary nebulae, making the direct determination of undepleted elemental iron abundances difficul…
The low-mass content of the massive young star cluster RCW 38
Koraljka Muzic, Rainer Schoedel, Alexander Scholz +4
RCW 38 is a deeply embedded young (~1 Myr), massive star cluster located at a distance of 1.7 kpc. Twice as dense as the Orion Nebula Cluster, orders of magnitude denser than other…
Ultracool dwarf benchmarks with \emph{Gaia} primaries
F. Marocco, D. J. Pinfield, N. J. Cook +14
We explore the potential of \emph{Gaia} for the field of benchmark ultracool/brown dwarf companions, and present the results of an initial search for metal-rich/metal-poor systems.…