2018ApJ...858..107A

Query : 2018ApJ...858..107A

2018ApJ...858..107A - Astrophys. J., 858, 107-107 (2018/May-2)

OGLE-2016-BLG-1266: a probable brown dwarf/planet binary at the deuterium fusion limit.

ALBROW M.D., YEE J.C., UDALSKI A., NOVATI S.C., CAREY S., HENDERSON C.B., BEICHMAN C., BRYDEN G., GAUDI B.S., SHVARTZVALD Y. (The Spitzer Team), SZYMANSKI M.K., MROZ P., SKOWRON J., POLESKI R., SOSZYNSKI I., KOZLOWSKI S., PIETRUKOWICZ P., ULACZYK K., PAWLAK M. (The OGLE Collaboration), CHUNG S.-J., GOULD A., HAN C., HWANG K.-H., JUNG Y.K., RYU Y.-H., SHIN I.-G., ZHU W., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., LEE C.-U., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W. (The KMTNet Collaboration)

Abstract (from CDS):

We report the discovery, via the microlensing method, of a new very low mass binary system. By combining measurements from Earth and from the Spitzer telescope in Earth-trailing orbit, we are able to measure the microlensing parallax of the event, and we find that the lens likely consists of a (12.0 ± 0.6)MJ + (15.7 ± 1.5)MJ super-Jupiter/brown dwarf pair. The binary is located at a distance of 3.08 ± 0.18 kpc in the Galactic plane, and the components have a projected separation of 0.43 ± 0.03 au. Two alternative solutions with much lower likelihoods are also discussed, an 8MJ and 6MJ model and a 90MJ and 70MJ model. If all photometric measurements were independent and Gaussian distributed with known variances, these alternative solutions would be formally disfavored at the 3σ and 5σ levels. We show how the more massive of these models could be tested with future direct imaging.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: general - brown dwarfs - gravitational lensing: micro

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12643 1
2 BD-13 2130 * 07 37 09.2332503816 -13 54 23.956897032   11.31 10.04     G5IV-V/K2III 67 1
3 NAME TW Hya Association As* 11 01.9 -34 42           ~ 942 0
4 TWA 42 BD* 11 19 32.54328 -11 37 46.6968           L7 38 0
5 OGLE-2016-BLG-1266 BD? 17 51 24.86 -29 44 32.1           ~ 6 0
6 MOA 2016-BLG-350 BD? 17 55 23.50 -30 12 26.1           ~ 32 0
7 * kap And PM* 23 40 24.5076320 +44 20 02.156595 3.80 4.06 4.14 4.15 4.22 B9IVn 199 0

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