Bibcode
Lodieu, N.; Dobbie, P. D.; Cross, N. J. G.; Hambly, N. C.; Read, M. A.; Blake, R. P.; Floyd, D. J. E.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 435, Issue 3, p.2474-2482
Fecha de publicación:
11
2013
Número de citas
20
Número de citas referidas
17
Descripción
We present the results of a deep ZYJ near-infrared survey of 13.5
deg2 in the Upper Scorpius (USco) OB association. We
photometrically selected ˜100 cluster member candidates with
masses in the range of 30-5 Jupiters, according to state-of-the-art
evolutionary models. We identified 67 ZYJ candidates as bona fide
members, based on complementary photometry and astrometry. We also
extracted five candidates detected with Visible and Infrared Survey
Telescope for Astronomy at YJ only. One is excluded using deep optical
z-band imaging, while two are likely non-members, and three remain as
potential members. We conclude that the USco mass function is more
likely decreasing in the planetary-mass regime (although a flat mass
function cannot yet be discarded), consistent with surveys in other
regions.
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