2022MNRAS.510.1778W

Query : 2022MNRAS.510.1778W

2022MNRAS.510.1778W - Mon. Not. R. Astron. Soc., 510, 1778-1790 (2022/February-3)

Systematic Korea Microlensing Telescope Network planetary anomaly search - III. One wide-orbit planet and two stellar binaries.

WANG H., ZANG W., ZHU W., HWANG K.-H., UDALSKI A., GOULD A., HAN C., ALBROW M.D., CHUNG S.-J., JUNG Y.K., KIM D., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., YEE J.C., 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., POLESKI R., MROZ P., SKOWRON J., SZYMANSKI M.K., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., ULACZYK K., RYBICKI K.A., IWANEK P., WRONA M., GROMADZKI M., YANG H., MAO S. and ZHANG X.

Abstract (from CDS):

Only a few wide-orbit planets around old stars have been detected, which limits our statistical understanding of this planet population. Following the systematic search for planetary anomalies in microlensing events found by the Korea Microlensing Telescope Network, we present the discovery and analysis of three events that were initially thought to contain wide-orbit planets. The anomalous feature in the light curve of OGLE-2018-BLG-0383 is caused by a planet with mass ratio q = 2.1 x 10–4 and a projected separation s = 2.45. This makes it the lowest mass-ratio microlensing planet at such wide orbits. The other two events, KMT-2018-BLG-0998 and OGLE-2018-BLG-0271, are shown to be stellar binaries (q > 0.1) with rather close (s < 1) separations. We briefly discuss the properties of known wide-orbit microlensing planets and show that the survey observations are crucial in discovering and further statistically constraining such a planet population.

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 - techniques: photometric

Simbad objects: 11

goto Full paper

goto View the references in ADS

Number of rows : 11
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 KMT-2016-BLG-1089 * 17 42 23.31 -33 45 35.2           ~ 11 0
2 OGLE-2008-BLG-092 ** 17 47 29.4593818584 -34 43 35.461182180       15.48   ~ 43 0
3 KMT-2018-BLG-0998 ** 17 50 59.890 -29 32 06.50           ~ 2 0
4 MOA-bin-1 * 17 51 10.20 -29 47 38.3         23 ~ 26 1
5 2MASS J17544337-2844214 * 17 54 43.3746243771 -28 44 21.394424553           ~ 8 0
6 OGLE-2018-BLG-0271 ** 17 56 42.25 -28 23 24.3           ~ 1 0
7 MOA 2011-BLG-133 * 17 57 15.7783191352 -28 14 01.888735332           ~ 7 0
8 MOA 2013-BLG-605 * 17 58 42.880 -29 23 53.60           ~ 21 0
9 MOA 2016-BLG-75 * 17 59 34.9386937392 -31 49 06.963389148           ~ 14 0
10 OGLE-2012-BLG-0022 * 18 01 46.31 -29 06 31.6           ~ 13 0
11 OGLE-2012-BLG-0838 * 18 12 00.7378 -25 42 41.790           ~ 7 0

To bookmark this query, right click on this link: simbad:objects in 2022MNRAS.510.1778W and select 'bookmark this link' or equivalent in the popup menu