2021MNRAS.503.2706K

Query : 2021MNRAS.503.2706K

2021MNRAS.503.2706K - Mon. Not. R. Astron. Soc., 503, 2706-2712 (2021/May-2)

OGLE-2018-BLG-1428Lb: a Jupiter-mass planet beyond the snow line of a dwarf star.

KIM Y.H., CHUNG S.-J., UDALSKI A., GOULD A., ALBROW M.D., JUNG Y.K., HWANG K.-H., HAN C., 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 C.-U., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W. (The KMTNet Collaboration), MROZ P., POLESKI R., WRONA M., IWANEK P., SZYMANSKI M.K., SKOWRON J., SOSZYNSKI I., KOZLOWSKI S., PIETRUKOWICZ P., ULACZYK K., RYBICKI K. (The OGLE Collaboration)

Abstract (from CDS):

We present the analysis of the microlensing event OGLE-2018-BLG-1428, which has a short-duration (∼1 d) caustic-crossing anomaly. The event was caused by a planetary lens system with planet/host mass ratio q = 1.7 x 10–3. Because of the detection of the caustic-crossing anomaly, the finite source effect was well measured, but the microlens parallax was not constrained due to the relatively short time-scale (tE = 24 d). From a Bayesian analysis, we find that the host star is a dwarf star Mhost=0.43+0.33–0.22 M☉ at a distance DL=6.22+1.03–1.51 kpc and the planet is a Jovian-mass planet Mp=0.77+0.77–0.53 MJ with a projected separation a⊥=3.30+0.59–0.83 au. The planet orbits beyond the snow line of the host star. Considering the relative lens-source proper motion of µrel = 5.58 ±0.38 mas yr–1, the lens can be resolved by adaptive optics with a 30 m telescope in the future.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): gravitational lensing: micro - planets and satellites: detection

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 - 2026 		#notes
1 MACHO LMC 5 * 05 16 41.1 -70 29 18     21.15     ~ 62 1
2 NAME EWS 2018-BLG-1428b Pl? 17 42 11.69 -26 08 16.4           ~ 1 0
3 OGLE-2018-BLG-1428 * 17 42 11.69 -26 08 16.4           ~ 3 0
4 MOA 2013-BLG-220 * 18 03 56.470 -29 32 40.78           ~ 15 0
5 MOA 2007-BLG-400 * 18 09 41.980 -29 13 26.95           ~ 47 1

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