2024A&A...691A.237H

Query : 2024A&A...691A.237H

2024A&A...691A.237H - Astronomy and Astrophysics, volume 691A237 (2024/11-1)

Microlensing brown-dwarf companions in binaries detected during the 2022 and 2023 seasons.

HAN C., BOND I.A., UDALSKI A., LEE C.-U., GOULD A., ALBROW M.D., CHUNG S.-J., HWANG K.-H., JUNG Y.K., 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., ABE F., BANDO K., BARRY R., BENNETT D.P., BHATTACHARYA A., FUJII H., FUKUI A., HAMADA R., HAMADA S., HAMASAKI N., HIRAO Y., ISHITANI SILVA S., ITOW Y., KIRIKAWA R., KOSHIMOTO N., MATSUBARA Y., MIYAZAKI S., MURAKI Y., NAGAI T., NUNOTA K., OLMSCHENK G., RANC C., RATTENBURY N.J., SATOH Y., SUMI T., SUZUKI D., TOMOYOSHI M., TRISTRAM P.J., VANDOROU A., YAMA H., YAMASHITA K., 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. and MROZ M.J.

Abstract (from CDS):

Aims. Building on previous works to construct a homogeneous sample of brown dwarfs in binary systems, we investigate microlensing events detected by the Korea Microlensing Telescope Network (KMTNet) survey during the 2022 and 2023 seasons.
Methods. Given the difficulty in distinguishing brown-dwarf events from those produced by binary lenses with nearly equal-mass components, we analyze all lensing events detected during the seasons that exhibit anomalies characteristic of binary-lens systems.
Results. Using the same criteria consistently applied in previous studies, we identify six additional brown dwarf candidates through the analysis of lensing events KMT-2022-BLG-0412, KMT-2022-BLG-2286, KMT-2023-BLG-0201, KMT-2023-BLG-0601, KMT-2023-BLG-1684, and KMT-2023-BLG-1743. An examination of the mass posteriors shows that the median mass of the lens companions ranges from 0.02 M⊙ to 0.05 M⊙, indicating that these companions fall within the brown-dwarf mass range. The mass of the primary lenses ranges from 0.11 M⊙ to 0.68 M⊙, indicating that they are low-mass stars with substantially lower masses compared to the Sun.

Abstract Copyright: © The Authors 2024

Journal keyword(s): gravitational lensing: micro

Simbad objects: 45

goto Full paper

goto View the references in ADS

Number of rows : 45
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-2023-BLG-0601 ** 17 27 03.640 -29 28 13.30           ~ 1 0
2 OGLE-2016-BLG-0890 Lev 17 30 25.690 -29 50 48.98           ~ 5 0
3 KMT-2019-BLG-0335 ** 17 31 21.72580320 -29 35 27.0050640           ~ 3 0
4 KMT-2023-BLG-1684 ** 17 35 25.770 -35 16 52.68           ~ 1 0
5 OGLE-2017-BLG-0776 * 17 36 14.7925170541 -27 02 35.988891589     19.56   16.72 ~ 3 0
6 OGLE-2017-BLG-0896 * 17 39 30.98 -27 17 51.1           ~ 11 0
7 KMT-2018-BLG-0321 ** 17 41 36.4150836401 -22 09 52.530961619           ~ 3 0
8 KMT-2018-BLG-0357 Lev 17 44 12.200 -33 36 23.18           ~ 4 0
9 OGLE-2019-BLG-0468 * 17 45 37.44 -24 26 50.2           G 14 0
10 KMT-2016-BLG-1107 * 17 45 40.260 -26 01 54.48           ~ 13 0
11 OGLE-2018-BLG-1489 Lev 17 45 46.600 -23 57 43.85           ~ 4 0
12 OGLE-2016-BLG-0693 * 17 49 55.29 -23 02 23.8           ~ 3 0
13 NAME EWS 2005-BLG-071b Pl 17 50 09.77 -34 40 23.5           ~ 52 1
14 OGLE-2016-BLG-0596 * 17 51 12.81 -30 50 59.4           ~ 7 0
15 OGLE-2016-BLG-1266 BD? 17 51 24.86 -29 44 32.1           ~ 7 0
16 OGLE-2019-BLG-0011 * 17 51 55.9223467199 -29 59 23.095862678           ~ 2 0
17 OGLE-2018-BLG-0360 Lev 17 52 01.260 -31 08 54.71           ~ 4 0
18 OGLE-2017-BLG-0504 * 17 52 09.6478600799 -31 49 13.424460290     19.52   16.59 ~ 3 0
19 OGLE-2016-BLG-0864 * 17 53 12.00 -30 11 32.1           ~ 7 0
20 OGLE-2019-BLG-0505 * 17 53 32.140 -31 33 18.08           ~ 9 0
21 KMT-2016-BLG-0212 * 17 53 45.420 -29 05 12.80           ~ 12 0
22 KMT-2023-BLG-1743 ** 17 54 53.730 -33 10 50.99           ~ 1 0
23 KMT-2021-BLG-1110 Lev 17 55 18.860 -30 22 24.49           ~ 2 0
24 OGLE-2018-BLG-1647 * 17 55 50.970 -31 49 01.20           ~ 5 0
25 KMT-2018-BLG-0885 ** 17 55 51.9015285072 -28 30 47.234523168           ~ 3 0
26 MOA 2018-BLG-182 * 17 56 03.36 -29 04 58.4           ~ 26 0
27 OGLE-2017-BLG-1375 * 17 56 37.17 -30 18 41.1           ~ 8 0
28 KMT-2022-BLG-2286 ** 17 56 39.660 -28 51 17.71           ~ 1 0
29 MOA 2016-BLG-383 * 17 58 52.30 -27 36 48.8           ~ 14 0
30 KMT-2016-BLG-2605 * 17 59 17.540 -26 58 55.20           ~ 6 0
31 KMT-2023-BLG-0201 ** 17 59 48.010 -30 29 59.89           ~ 1 0
32 MOA 2019-BLG-131 ** 18 00 15.190 -28 57 55.01           ~ 3 0
33 OGLE-2017-BLG-1522 * 18 01 16.65 -28 27 43.1           ~ 10 0
34 KMT-2021-BLG-1770 Lev 18 01 45.590 -27 25 07.21           ~ 2 0
35 UCAC4 313-136813 * 18 02 11.3080588558 -27 29 51.407681514     17.80   15.32 ~ 3 0
36 KMT-2022-BLG-2397 Lev 18 02 19.730 -26 53 28.10           ~ 3 0
37 KMT-2021-BLG-1643 Lev 18 02 32.530 -30 36 18.68           ~ 2 0
38 KMT-2017-BLG-1757 Lev 18 05 50.000 -27 04 38.50           ~ 4 0
39 KMT-2021-BLG-0588 Lev 18 06 53.320 -27 25 19.31           ~ 2 0
40 OGLE-2016-BLG-1469 BD? 18 07 46.98 -26 17 23.6           ~ 5 0
41 MOA 2015-BLG-337 * 18 07 47.71 -28 10 12.6           ~ 13 0
42 OGLE-2014-BLG-1112 * 18 08 36.31 -28 39 56.9           ~ 5 0
43 2MASS J18083825-3003386 ** 18 08 38.2563956550 -30 03 38.728877436         15.711 ~ 3 0
44 KMT-2022-BLG-0412 ** 18 16 43.380 -26 36 00.29           ~ 1 0
45 NAME Galactic Bulge reg ~ ~           ~ 4794 0

To bookmark this query, right click on this link: simbad:objects in 2024A&A...691A.237H and select 'bookmark this link' or equivalent in the popup menu