2020AJ....159...48H

Query : 2020AJ....159...48H

2020AJ....159...48H - Astron. J., 159, 48-48 (2020/February-0)

OGLE-2018-BLG-1700L: microlensing planet in binary stellar system.

HAN C., LEE C.-U., UDALSKI A., GOULD A., BOND I.A. (The Leading Authors), ALBROW M.D., CHUNG S.-J., HWANG K.-H., JUNG Y.K., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., YEE J.C., ZANG W., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W., JEE M.J., KIM D. (The KMTNet Collaboration), MROZ P., SZYMANSKI M.K., SKOWRON J., POLESKI R., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., ULACZYK K., RYBICKI K.A., IWANEK P., WRONA M. (The OGLE Collaboration), ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., FUJII H., FUKUI A., ITOW Y., HIRAO Y., KAMEI Y., 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., YAMAKAWA T., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We report a planet in a binary that was discovered from the analysis of the microlensing event OGLE-2018-BLG-1700. We identify the triple nature of the lens from the fact that the anomaly pattern can be decomposed into two parts produced by two binary-lens events, in which one binary pair has a mass ratio of ∼0.01 between the lens components and the other pair has a mass ratio of ∼0.3. We find two sets of degenerate solutions, in which one solution has a projected separation between the primary and its stellar companion less than the angular Einstein radius θE (close solution), while the other solution has a separation greater than θE (wide solution). From the Bayesian analysis with the constraints of the event timescale and angular Einstein radius, we find that the planet has a mass of 4.4–2.0+3.0MJ and the stellar binary components have masses of 0.42–0.19+0.29M☉ and 0.12–0.05+0.08M☉, respectively, and the distance to the lens is DL=7.6–0.9+1.2kpc. The planet is a circumstellar planet according to the wide solution, while it is a circumbinary planet according to the close solution.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet systems - Binary stars

CDS comments: EWS 2016-BLG-0613L(AB)c is a probable misprint for EWS 2016-BLG-0613L(AB)b.

Simbad objects: 15

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Number of rows : 15
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-2012-BLG-0026 * 17 34 18.7004610096 -27 08 33.867112596           ~ 55 1
2 OGLE-2008-BLG-092 ** 17 47 29.4593818584 -34 43 35.461182180       15.48   ~ 43 0
3 MOA 2013-BLG-260 ** 17 52 07.49 -29 50 46.0           ~ 45 0
4 OGLE-2006-BLG-109 * 17 52 34.55 -30 05 15.7     19.035   16.643 ~ 94 2
5 OGLE-2014-BLG-1722 * 17 55 00.570 -31 28 08.62           ~ 17 0
6 MOA 2018-BLG-182 * 17 56 03.36 -29 04 58.4           ~ 26 0
7 OGLE-2015-BLG-1459 * 17 56 09.90 -29 49 26.3           ~ 12 0
8 NAME EWS 2016-BLG-0613b Pl 17 57 02.50 -28 06 58.2           ~ 5 0
9 OGLE-2016-BLG-0613 ** 17 57 02.50 -28 06 58.2           ~ 29 0
10 OGLE-2018-BLG-1700 * 17 59 49.45 -28 31 43.1           ~ 26 0
11 OGLE-2018-BLG-0532 * 17 59 56.02 -28 59 51.9           ~ 15 0
12 NAME MOA 2007-BLG-379Ac Pl 18 05 24.43 -26 25 18.8           ~ 12 0
13 MOA 2007-BLG-379 ** 18 05 24.43 -26 25 18.8           ~ 58 1
14 MOA 2018-BLG-147 * 18 08 42.47 -29 50 08.9           ~ 9 0
15 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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