A new free-floating planet in the Upper Scorpius association

Debris Disks in the Upper Scorpius Ob Association

We present MIPS 24μm and 70μm photometry for 205 members of the Upper Scorpius OB Association. These data are combined with published MIPS photometry for 15 additional association members to assess the frequency of circumstellar disks around 5 Myr old stars with spectral types between B0 and M5. Twelve stars have a detectable 70μm excess, each of which also has a detectable 24μm excess. A total...

Brown Dwarfs in Upper Scorpius

A search for planetary-mass objects and brown dwarfs in the Upper Scorpius association

We report the results of a deep photometric search for planets and brown dwarfs in the nearby young OB Upper Scorpius association. We obtained optical (I) and near-infrared (JKs) images around nine very lowmass stars and brown dwarf member candidates of the association, covering a total area of 113 arcmin. Using a point spread function subtraction technique, we have searched for planetary-mass ...

EVIDENCE FOR MASS-DEPENDENT CIRCUMSTELLAR DISK EVOLUTION IN THE 5 Myr OLD UPPER SCORPIUS OB ASSOCIATION

We present 4.5, 8, and 16 mm photometry from the Spitzer Space Telescope for 204 stars in the Upper Scorpius OB association. The data are used to investigate the frequency and properties of circumstellar disks around stars with masses between ∼0.1 and 20 at an age of ∼5 Myr. We identify 35 stars that have emission at 8 or 16 mm in excess of the M, stellar photosphere. The lower mass stars (∼0.1...

An Alma Continuum Survey of Circumstellar Disks in the Upper Scorpius Ob Association

We present ALMA 880μm continuum observations of 20 K and M-type stars in the Upper Scorpius OB association that are surrounded by protoplanetary disks. These data are used to measure the dust content in disks around low mass stars (0.1-1.6M⊙) at a stellar age of 5-11Myr. Thirteen sources were detected in the 880μm dust continuum at ≥ 3σ with inferred dust masses between 0.3 and 52M⊕. The dust m...