Proper motions of Upper Sco T-type candidates
arXiv:1303.1985 · doi:10.1093/mnras/sts726
Abstract
We present new z- and H-band photometry and proper motion measurements for the five candidate very-low-mass T-type objects we recently proposed to be members of the nearest OB association to the Sun, Upper Scorpius. These new data fail to corroborate our prior conclusions regarding their spectral types and affiliation with the Upper Scorpius population. We conclude that we may be in presence of a turnover in the mass function of Upper Sco taking place below 10-4 Jupiter masses, depending on the age assigned to Upper Sco and the models used.
6 pages, 3 figures, 2 tables, accepted to MNRAS (in press)
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- New Young Stars and Brown Dwarfs in the Upper Scorpius Association
- Substellar Objects in Nearby Young Clusters (SONYC) IX: The planetary-mass domain of Chamaeleon-I and updated mass function in Lupus-3
- Probing the Upper Scorpius mass function in the planetary-mass regime
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