Adaptive optics observations of the T10 ultracool dwarf UGPS J072227.51-054031.2

Bouy, H., Girard, J.H.V., Martin, E.L., Huelamo, N. and Lucas, P.W. (2011) Adaptive optics observations of the T10 ultracool dwarf UGPS J072227.51-054031.2. Astronomy & Astrophysics, 526 (7). ISSN 0004-6361

Copy

Context: With a spectral type of T10, UGPS J072227.51-054031.2 is one of the coolest objects known to date in the solar neighborhood. Aims: Multiple systems are relatively common among early and mid-T dwarfs. We search for faint and close companions around UGPS J072227.51-054031.2. Methods: We have obtained high spatial resolution images in the H and Ks bands using adaptive optics at the Very Large Telescope. Results: With a Strehl ratio in the range 10–15%, the final images allow us to rule out the presence of a companion brighter than H 19.4 mag at separation larger than 50 mas, and H 21.4 mag at separation larger than 01.

Item Type	Article
Identification Number	10.1051/0004-6361/201015289
Additional information	Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory
Keywords	binaries: general, brown dwarfs, techniques: high angular resolution
Date Deposited	15 May 2025 12:04
Last Modified	27 May 2026 19:56