2023A&A...670A.172H

Query : 2023A&A...670A.172H

2023A&A...670A.172H - Astronomy and Astrophysics, volume 670A172 (2023/2-1)

OGLE-2018-BLG-0584 and KMT-2018-BLG-2119: Two microlensing events with two lens masses and two source stars.

HAN C., UDALSKI A., JUNG Y.K., KIM D., YANG H., ALBROW M.D., CHUNG S.-J., GOULD A., HWANG K.-H., KIM H.-W., LEE C.-U., RYU Y.-H., SHVARTZVALD Y., SHIN I.-G., YEE J.C., ZANG W., CHA S.-M., KIM D.-J., KIM S.-L., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W., KIM C.-H., KIM W.-T., MROZ P., SZYMANSKI M.K., SKOWRON J., POLESKI R., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., RYBICKI K.A., IWANEK P., ULACZYK K., WRONA M. and GROMADZKI M.

Abstract (from CDS):


Aims. We conducted a systematic investigation of the microlensing data collected during the previous observation seasons for the purpose of re-analyzing anomalous lensing events with no suggested plausible models.
Methods. We found that two anomalous lensing events, OGLE-2018-BLG-0584 and KMT-2018-BLG-2119, cannot be explained with the usual models based on either a binary-lens single-source (2L1S) or a single-lens binary-source (1L2S) interpretation. We tested the feasibility of explaining the light curves of the events with more sophisticated models by adding either an extra lens (3L1S model) or a source (2L2S model) component to the 2L1S lens system configuration.
Results. We find that a 2L2S interpretation explains the light curves of both events well and that for each event there are a pair of solutions resulting from the close and wide degeneracy. For the event OGLE-2018-BLG-0584, the source is a binary composed of two K-type stars and the lens is a binary composed of two M dwarfs. For KMT-2018-BLG-2119, the source is a binary composed of two dwarfs of G and K spectral types and the lens is a binary composed of a low-mass M dwarf and a brown dwarf.

Abstract Copyright: © The Authors 2023

Journal keyword(s): binaries: general - gravitational lensing: micro

Simbad objects: 23

goto Full paper

goto View the references in ADS

Number of rows : 23
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-2016-BLG-1003 * 17 36 25.23 -27 11 19.9           ~ 11 0
3 2MASS J17424606-2722319 ** 17 42 46.0714267205 -27 22 32.082498230           ~ 12 0
4 OGLE-2019-BLG-0468 * 17 45 37.44 -24 26 50.2           G 14 0
5 KMT-2021-BLG-1077 * 17 45 57.390 -33 50 34.12           ~ 13 0
6 OGLE-2008-BLG-092 ** 17 47 29.4593818584 -34 43 35.461182180       15.48   ~ 43 0
7 KMT-2021-BLG-0240 * 17 50 18.550 -30 00 17.89           ~ 12 0
8 OGLE-2006-BLG-109 * 17 52 34.55 -30 05 15.7     19.035   16.643 ~ 94 2
9 OGLE-2018-BLG-0584 Lev 17 53 36.290 -31 19 42.60           ~ 8 0
10 KMT-2019-BLG-0797 * 17 53 48.090 -31 58 36.70           ~ 10 0
11 MOA 2018-BLG-182 * 17 56 03.36 -29 04 58.4           ~ 26 0
12 KMT-2018-BLG-2119 Lev 17 56 47.620 -28 40 59.99           ~ 8 0
13 OGLE-2016-BLG-0613 ** 17 57 02.50 -28 06 58.2           ~ 29 0
14 OGLE-2006-BLG-284 * 17 58 38.22 -29 08 12.0           ~ 14 0
15 OGLE-2018-BLG-1700 * 17 59 49.45 -28 31 43.1           ~ 26 0
16 OGLE-2019-BLG-1190 * 18 01 29.21 -28 46 37.7           ~ 12 0
17 MOA 2007-BLG-379 ** 18 05 24.43 -26 25 18.8           ~ 58 1
18 OGLE-2005-BLG-169 * 18 06 05.32 -30 43 57.5     20.4     ~ 68 1
19 KMT-2020-BLG-0414 * 18 07 39.60 -28 29 06.8           ~ 24 0
20 MOA 2010-BLG-117 * 18 07 49.670 -25 20 40.69           ~ 18 0
21 KMT-2018-BLG-1743 * 18 17 08.010 -26 21 34.70           ~ 12 0
22 KMT-2021-BLG-1122 Lev ~ ~           ~ 7 0
23 NAME Galactic Bulge reg ~ ~           ~ 4794 0

To bookmark this query, right click on this link: simbad:objects in 2023A&A...670A.172H and select 'bookmark this link' or equivalent in the popup menu