2020AJ....160..148J

Query : 2020AJ....160..148J

2020AJ....160..148J - Astron. J., 160, 148-148 (2020/September-0)

OGLE-2018-BLG-1269Lb: a jovian planet with a bright I = 16 host.

JUNG Y.K., GOULD A., UDALSKI A., SUMI T., YEE J.C., HAN C., ALBROW M.D., CHUNG S.-J., HWANG K.-H., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., ZHU W., 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., 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., BOND I.A., BHATTACHARYA A., DONACHIE M., FUKUI A., HIRAO Y., ITOW Y., KONDO I., KOSHIMOTO N., LI M.C.A., MATSUBARA Y., MIYAZAKI S., MURAKI Y., NAGAKANE M., RANC C., RATTENBURY N.J., SUEMATSU H., SULLIVAN D.J., SUZUKI D., TRISTRAM P.J., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We report the discovery of a planet in the microlensing event OGLE-2018-BLG-1269 with a planet-host mass ratio q ∼ 6 x 10–4, i.e., 0.6 times smaller than the Jupiter/Sun mass ratio. Combined with the Gaia parallax and proper motion, a strong one-dimensional constraint on the microlens parallax vector allows us to significantly reduce the uncertainties of lens physical parameters. A Bayesian analysis that ignores any information about light from the host yields that the planet is a cold giant (M2=0.69–0.22+0.44MJ) orbiting a Sun-like star (M1=1.13–0.35+0.72M☉) at a distance of DL=2.56–0.62+0.92kpc. The projected planet-host separation is a⊥=4.61–1.17+1.70au. Using Gaia astrometry, we show that the blended light lies ≲12mas from the host and therefore must be either the host star or a stellar companion to the host. An isochrone analysis favors the former possibility at >99.6%. The host is therefore a subgiant. For host metallicities in the range of 0.0≤ [Fe/H]≤ +0.3, the host and planet masses are then in the range of 1.16≤ M1/M☉≤ 1.38 and 0.74≤ M2/MJ≤ 0.89, respectively. Low host metallicities are excluded. The brightness and proximity of the lens make the event a strong candidate for spectroscopic follow-up both to test the microlensing solution and to further characterize the system.

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

Journal keyword(s): Gravitational microlensing - Gravitational microlensing exoplanet detection

VizieR on-line data: <Available at CDS (J/AJ/160/148): kmta03i.dat kmta43i.dat kmtc03i.dat kmtc43i.dat kmts03i.dat kmts43i.dat moar.dat oglei.dat>

Simbad objects: 8

goto Full paper

goto View the references in ADS

Number of rows : 8
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 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
2 NAME EWS 2006-BLG-109b Pl 17 52 34.55 -30 05 15.7           ~ 46 1
3 OGLE-2006-BLG-109 * 17 52 34.55 -30 05 15.7     19.035   16.643 ~ 94 2
4 KMT-2017-BLG-0243 * 17 55 59.9159 -29 51 47.317           ~ 9 0
5 OGLE-2018-BLG-1269 * 17 58 46.42 -27 37 04.6           ~ 6 0
6 NAME EWS 2018-BLG-1269b Pl? 17 58 46.42 -27 37 04.6           ~ 2 0
7 MOA 2018-BLG-147b Pl 18 08 42.47 -29 50 08.9           ~ 4 0
8 NAME Galactic Bulge reg ~ ~           ~ 4794 0

To bookmark this query, right click on this link: simbad:objects in 2020AJ....160..148J and select 'bookmark this link' or equivalent in the popup menu