2019ApJ...872..175J

Query : 2019ApJ...872..175J

2019ApJ...872..175J - Astrophys. J., 872, 175-175 (2019/February-3)

OGLE-2016-BLG-0156: microlensing event with pronounced microlens-parallax effects yielding a precise lens mass measurement.

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

Abstract (from CDS):

We analyze the gravitational binary-lensing event OGLE-2016-BLG-0156, for which the lensing light curve displays pronounced deviations induced by microlens-parallax effects. The light curve exhibits three distinctive widely separated peaks and we find that the multiple-peak feature provides a very tight constraint on the microlens-parallax effect, enabling us to precisely measure the microlens parallax πE. All the peaks are densely and continuously covered from high-cadence survey observations using globally located telescopes and the analysis of the peaks leads to the precise measurement of the angular Einstein radius θE. From the combination of the measured πE and θE, we determine the physical parameters of the lens. It is found that the lens is a binary composed of two M dwarfs with masses M1 = 0.18 ± 0.01 M☉ and M2 = 0.16 ± 0.01 M☉ located at a distance DL=1.35±0.09 kpc. According to the estimated lens mass and distance, the flux from the lens comprises an important fraction, ∼25%, of the blended flux. The bright nature of the lens combined with the high relative lens-source motion, µ = 6.94 ± 0.50 mas yr–1, suggests that the lens can be directly observed from future high-resolution follow-up observations.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

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

Simbad objects: 6

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Number of rows : 6
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 OGLE-2014-BLG-0289 * 17 53 51.66 -29 05 05.6           ~ 3 0
2 MOA 2008-BLG-310 * 17 54 14.53 -34 46 41.0           GV 51 1
3 OGLE-2016-BLG-0156 * 17 56 36.63 -31 04 40.7           ~ 3 0
4 OGLE-2017-BLG-0039 * 18 01 47.95 -27 20 34.7           ~ 4 0
5 OGLE-2005-BLG-169 * 18 06 05.32 -30 43 57.5     20.4     ~ 68 1
6 MOA 2012-BLG-527 * 18 08 04.62 -29 43 53.7           ~ 28 0

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