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A Deep JI Survey of the Pleiades for Freely-Floating Superplanets and Brown Dwarfs at the Deuterium Burning Limit

Published online by Cambridge University Press:  26 May 2016

M. J. Schwartz ,
E. E. Becklin  and
B. Zuckerman
M. J. Schwartz
Affiliation:
University of California Los Angeles, 8371 Mathematical Sciences Building, Los Angeles CA 90095–1562
E. E. Becklin
Affiliation:
University of California Los Angeles, 8371 Mathematical Sciences Building, Los Angeles CA 90095–1562
B. Zuckerman
Affiliation:
University of California Los Angeles, 8371 Mathematical Sciences Building, Los Angeles CA 90095–1562

Abstract

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We present preliminary results from a deep near-infrared J-band and I-band photometric survey of the Pleiades for freely-floating superplanets and brown dwarfs (BD) near the deuterium burning limit (DBL). With limiting magnitudes of J=20.5 and I=23.5, we have selected candidate Pleiads on the basis of evolutionary tracks, color-magnitudes, and I-J color lower limits (non-detections at deep I-band). Likelihoods of membership will be ultimately determined by a combination of image profile analysis, spectral energy distribution, proper motion, and low-resolution measurements of near-infrared water and/or methane absorption slopes. If confirmed, our faintest candidates are predicted to have made the transition from L to T spectral types with temperatures down to 820 K, and masses approaching 10 MJup.

Type
Part 4. Observations of Young Brown Dwarfs (age ≃ 50–200 Myr)
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 185 - 186
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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