2024A&A...686A.234H

Query : 2024A&A...686A.234H

2024A&A...686A.234H - Astronomy and Astrophysics, volume 686A234 (2024/6-1)

OGLE-2018-BLG-0971, MOA-2023-BLG-065, and OGLE-2023-BLG-0136: Microlensing events with prominent orbital effects.

HAN C., UDALSKI A., BOND I.A., LEE C.-U., GOULD A., ALBROW M.D., CHUNG S.-J., HWANG K.-H., JUNG Y.K., KIM H.-W., RYU Y.-H., SHVARTZVALD Y., SHIN I.-G., YEE J.C., YANG H., ZANG W., CHA S.-M., KIM D., KIM D.-J., KIM S.-L., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W., MROZ P., SZYMANSKI M.K., SKOWRON J., POLESKI R., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., RYBICKI K.A., IWANEK P., ULACZYK K., WRONA M., GROMADZKI M., MROZ M.J., ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., FUJII H., FUKUI A., HAMADA R., HIRAO Y., ISHITANI SILVA S., ITOW Y., KIRIKAWA R., KOSHIMOTO N., MATSUBARA Y., MIYAZAKI S., MURAKI Y., OLMSCHENK G., RANC C., RATTENBURY N.J., SATOH Y., SUMI T., SUZUKI D., TOMOYOSHI M., TRISTRAM P.J., VANDOROU A., YAMA H. and YAMASHITA K.

Abstract (from CDS):

Aims. We undertake a project to reexamine microlensing data gathered from high-cadence surveys. The aim of the project is to reinvestigate lensing events whose light curves exhibit intricate anomaly features that are associated with caustics, but lack prior proposed models that would explain these features.
Methods. Through detailed reanalyses considering higher-order effects, we determined that it is vital to account for the orbital motions of lenses to accurately explain the anomaly features observed in the light curves of the lensing events OGLE-2018-BLG-0971, MOA-2023-BLG-065, and OGLE-2023-BLG-0136.
Results. We estimated the masses and distances to the lenses by conducting Bayesian analyses using the lensing parameters of the newly found lensing solutions. These analyses showed that the lenses of the events OGLE-2018-BLG-0971 and MOA-2023-BLG-065 are binaries composed of M dwarfs, while the lens of OGLE-2023-BLG-0136 likely is a binary composed of an early K-dwarf primary and a late M-dwarf companion. For all lensing events, the probability that the lens resides in the bulge is considerably higher than that it is located in the disk.

Abstract Copyright: © The Authors 2024

Journal keyword(s): gravitational lensing: micro

Simbad objects: 12

goto Full paper

goto View the references in ADS

Number of rows : 12
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-2013-BLG-0723 BD? 17 34 40.51 -27 26 53.2           ~ 23 0
2 OGLE-2012-BLG-0031 * 17 50 50.53 -29 10 48.8           ~ 2 0
3 OGLE-2005-BUL-018 * 17 51 23.53 -29 39 22.8           ~ 7 0
4 OGLE-2006-BLG-109 * 17 52 34.55 -30 05 15.7     19.035   16.643 ~ 94 2
5 MACHO 97-BLG-41 ** 17 56 20.7 -28 47 42           ~ 58 1
6 KMT-2018-BLG-2336 Lev 17 59 01.630 -28 13 42.20           ~ 3 0
7 KMT-2023-BLG-2430 Lev 18 00 35.680 -29 13 23.95           ~ 3 0
8 OGLE-2006-BLG-277 * 18 01 14.84 -27 48 36.2           ~ 7 0
9 KMT-2021-BLG-0322 * 18 03 38.800 -29 36 15.80           ~ 6 0
10 OGLE-2009-BLG-020 * 18 04 20.960 -29 31 08.96           ~ 12 0
11 KMT-2023-BLG-2849 Lev 18 09 16.970 -30 36 47.00           ~ 3 0
12 UCAC4 601-089725 ** 19 40 01.1354321437 +30 07 53.453174121       15.69   K5 24 1

To bookmark this query, right click on this link: simbad:objects in 2024A&A...686A.234H and select 'bookmark this link' or equivalent in the popup menu