2014A&A...561L...4B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST14:01:38

2014A&A...561L...4B - Astronomy and Astrophysics, volume 561, L4-4 (2014/1-1)

Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57-531906.1.

BOFFIN H.M.J., POURBAIX D., MUZIC K., IVANOV V.D., KURTEV R., BELETSKY Y., MEHNER A., BERGER J.P., GIRARD J.H. and MAWET D.

Abstract (from CDS):

Using FORS2 on the Very Large Telescope, we have astrometrically monitored over a period of two months the two components of the brown dwarf system WISE J104915.57-531906.1, the closest one to the Sun. Our astrometric measurements - with a relative precision at the milli-arcsecond scale - allowed us to detect the orbital motion and derive more precisely the parallax of the system, leading to a distance of 2.020 ±0.019 pc. The relative orbital motion of the two objects is found to be perturbed, which leads us to suspect the presence of a substellar companion around one of the two components. We also performed VRIz photometry of the two components and compared this with models. We confirm the flux reversal of the T dwarf.

Abstract Copyright:

Journal keyword(s): binaries: visual - parallaxes - astrometry - brown dwarfs

CDS comments: Paragraph 4. standard star E5 not identified.

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME Luhman 16 ** 10 49 18.915 -53 19 10.08   16.86 16.20   14.95 L7.5+T0.5 63 0
2 WG 22 WD* 12 38 49.7813250074 -49 48 00.218655097   14.14 13.96     DA4.2 201 0
3 * alf Cen ** 14 39 29.71993 -60 49 55.9990   0.4 -0.1     G2V+K1V 790 0
4 * alf Cen B PM* 14 39 35.06311 -60 50 15.0992 2.89 2.21 1.33     K1V 864 1
5 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 623 2

    Equat.    Gal    SGal    Ecl

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2019.10.17-14:01:38

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