2017AJ....154..133H

Query : 2017AJ....154..133H

2017AJ....154..133H - Astron. J., 154, 133-133 (2017/October-0)

OGLE-2016-BLG-0263Lb: microlensing detection of a very low-mass binary companion through a repeating event channel.

HAN C., UDALSKI A., GOULD A., BOND I.A., ALBROW M.D., CHUNG S.-J., JUNG Y.K., RYU Y.-H., SHIN I.-G., YEE J.C., ZHU W., CHA S.-M., KIM S.-L., KIM D.-J., LEE C.-U., LEE Y., PARK B.-G. (The KMTNet Collaboration), SKOWRON J., MROZ P., PIETRUKOWICZ P., KOZLOWSKI S., POLESKI R., SZYMANSKI M.K., SOSZYNSKI I., ULACZYK K., PAWLAK M. (The OGLE Collaboration), ABE F., ASAKURA Y., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., EVANS P., FUKUI A., HIRAO Y., ITOW Y., KOSHIMOTO N., LI M.C.A., LING C.H., MASUDA K., MATSUBARA Y., MURAKI Y., NAGAKANE M., OHNISHI K., RANC C., RATTENBURY N.J., SAITO T., SHARAN A., SULLIVAN D.J., SUMI T., SUZUKI D., TRISTRAM P.J., YAMADA T., YAMADA T., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We report the discovery of a planet-mass companion to the microlens OGLE-2016-BLG-0263L. Unlike most low-mass companions that were detected through perturbations to the smooth and symmetric light curves produced by the primary, the companion was discovered through the channel of a repeating event, in which the companion itself produced its own single-mass light curve after the event produced by the primary had ended. Thanks to the continuous coverage of the second peak by high-cadence surveys, the possibility of the repeating nature due to source binarity is excluded with a 96% confidence level. The mass of the companion estimated by a Bayesian analysis is Mp=4.1–2.5+6.5 MJ. The projected primary-companion separation is a⊥=6.5–1.9+1.3 au. The ratio of the separation to the snow-line distance of a⊥/asl∼15.4 corresponds to the region beyond Neptune, the outermost planet of the solar system. We discuss the importance of high-cadence surveys in expanding the range of microlensing detections of low-mass companions and future space-based microlensing surveys.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): brown dwarfs - gravitational lensing: micro - planetary systems - planetary systems

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 - 2026 		#notes
1 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
2 NAME EWS 2008-BLG-92Ab Pl 17 47 29.4593818584 -34 43 35.461182180           ~ 13 0
3 NAME OGLE 2016-BLG-596b Pl? 17 51 12.81 -30 50 59.4           ~ 3 0
4 NAME EWS 2012-BLG-406b Pl 17 53 18.1720882080 -30 28 16.194776664           ~ 6 0
5 KMT-2015-BLG-0048b Pl 17 58 39.01 -28 01 54.1           ~ 8 0
6 KMT-2015-BLG-0048 * 17 58 39.01 -28 01 54.1           ~ 7 0
7 MOA 2016-BLG-75b Pl 17 59 34.9386937392 -31 49 06.963389148           ~ 4 0
8 MOA 2016-BLG-75 * 17 59 34.9386937392 -31 49 06.963389148           ~ 14 0
9 NAME EWS 2015-BLG-0954b Pl 18 00 44.24 -28 39 39.2           ~ 6 0
10 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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