2011A&A...526A..55B


Query : 2011A&A...526A..55B

2011A&A...526A..55B - Astronomy and Astrophysics, volume 526A, 55-55 (2011/2-1)

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.

Abstract (from CDS):

With a spectral type of T10, UGPS J072227.51-054031.2 is one of the coolest objects known to date in the solar neighborhood. Multiple systems are relatively common among early and mid-T dwarfs. We search for faint and close companions around UGPS J072227.51-054031.2. We have obtained high spatial resolution images in the H and Ks bands using adaptive optics at the Very Large Telescope. 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≲19.4mag at separation larger than 50 mas, and H≲21.4mag at separation larger than 0.1''.

Abstract Copyright:

Journal keyword(s): binaries: general - brown dwarfs - techniques: high angular resolution

Nomenclature: Table 1, Figure 1 : [BGM2011b] JHHMMSS.ss+DDMMSS.s N=8

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 [BGM2011b] J072226.97-054029.4 * 07 22 26.97 -05 40 29.4           ~ 1 0
2 [BGM2011b] J072227.02-054039.2 * 07 22 27.02 -05 40 39.2           ~ 1 0
3 [BGM2011b] J072227.28-054030.0 * 07 22 27.28 -05 40 30.0           ~ 1 0
4 [BGM2011b] J072227.34-054026.8 * 07 22 27.34 -05 40 26.8           ~ 1 0
5 WISE J072227.27-054029.9 BD* 07 22 27.51096 -05 40 31.2096           T9 74 0
6 [BGM2011b] J072227.56-054034.4 * 07 22 27.56 -05 40 34.4           ~ 1 0
7 2MASS J07222760-0540384 * 07 22 27.6018952248 -05 40 38.348869980           ~ 2 0
8 [BGM2011b] J072227.64-054033.0 * 07 22 27.64 -05 40 33.0           ~ 1 0
9 [BGM2011b] J072227.79-054034.7 * 07 22 27.79 -05 40 34.7           ~ 1 0
10 UCAC3 169-73338 * 07 22 28.4877349800 -05 40 37.795609992           ~ 1 0

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2023.09.26-08:43:48

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