2022A&A...666A.132H


Query : 2022A&A...666A.132H

2022A&A...666A.132H - Astronomy and Astrophysics, volume 666A, 132 (2022/10-1)

KMT-2017-BLG-0673Lb and KMT-2019-BLG-0414Lb: Two microlensing planets detected in peripheral fields of KMTNet survey.

HAN C., LEE C.-U., GOULD A., JUNG Y.K., ALBROW M.D., CHUNG S.-J., HWANG K.-H., KIM D., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., YANG H., YEE J.C., ZANG W., CHA S.-M., KIM D.-J., KIM S.-L., LEE D.-J., LEE Y., PARK B.-G. and POGGE R.W.

Abstract (from CDS):


Aims. We investigate the microlensing data collected during the 2017-2019 seasons in the peripheral Galactic bulge fields with the aim of finding planetary signals in microlensing light curves observed with relatively sparse coverage.
Methods. We first sort out lensing events with weak short-term anomalies in the lensing light curves from the visual inspection of all non-prime-field events, and then test various interpretations of the anomalies. From this procedure, we find two previously unidentified candidate planetary lensing events KMT-2017-BLG-0673 and KMT-2019-BLG-0414. It is found that the planetary signal of KMT-2017-BLG-0673 was produced by the source crossing over a planet-induced caustic, but it was previously missed because of the sparse coverage of the signal. On the other hand, the possibly planetary signal of KMT-2019-BLG-0414 was generated without caustic crossing, and it was previously missed due to the weakness of the signal. We identify a unique planetary solution for KMT-2017-BLG-0673. However, for KMT-2019-BLG-0414, we identify two pairs of planetary solutions, for each of which there are two solutions caused by the close-wide degeneracy, and a slightly less favored binary-source solution, in which a single lens mass gravitationally magnified a rapidly orbiting binary source with a faint companion (xallarap).
Results. From Bayesian analyses, it is estimated that the planet KMT-2017-BLG-0673Lb has a mass of 3.7–2.1+2.2MJ, and it is orbiting a late K-type host star with a mass of 0.63–0.35+0.37M. Under the planetary interpretation of KMT-2010-BLG-0414L, a star with a mass of 0.74–0.38+0.43M hosts a planet with a mass of ∼3.2-3.6 MJ depending on the solution. We discuss the possible resolution of the planet-xallarap degeneracy of KMT-2019-BLG-0414 by future adaptive-optics observations on 30 m class telescopes. The detections of the planets indicate the need for thorough investigations of non-prime-field lensing events for the complete census of microlensing planet samples.

Abstract Copyright: © C. Han et al. 2022

Journal keyword(s): planets and satellites: detection - gravitational lensing: micro

Simbad objects: 41

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Number of rows : 41
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME EWS 2017-BLG-1099b Pl? 17 35 51.420 -29 35 09.10           ~ 3 0
2 OGLE-2018-BLG-0298 Lev 17 37 08.280 -29 42 32.80           ~ 2 0
3 KMT-2018-BLG-0087 Lev 17 37 18.480 -27 49 55.42           ~ 2 0
4 KMT-2018-BLG-0030 Lev 17 38 04.000 -28 02 29.85           ~ 2 0
5 OGLE-2018-BLG-1219 Lev 17 38 14.410 -27 09 01.48           ~ 2 0
6 KMT-2017-BLG-0673 Lev 17 39 01.690 -33 48 28.91           ~ 2 0
7 KMT-2018-BLG-1988b Pl? 17 41 07.8175833212 -35 35 40.895936221           ~ 5 0
8 KMT-2017-BLG-2509b Pl? 17 42 21.570 -26 19 01.74           ~ 2 0
9 KMT-2016-BLG-2364b * 17 42 51.760 -27 26 08.02           ~ 5 0
10 KMT-2016-BLG-2397b * 17 44 51.010 -23 12 04.97           ~ 5 0
11 KMT-2018-BLG-1976b Pl? 17 45 25.120 -35 42 01.19           ~ 3 0
12 NAME EWS 2019-BLG-0299b Pl? 17 46 43.070 -23 35 03.52           ~ 2 0
13 KMT-2018-BLG-2602 Lev 17 49 35.290 -21 58 34.32           ~ 2 0
14 NAME EWS 2018-BLG-0506b Pl? 17 50 31.000 -31 55 27.00           ~ 5 0
15 KMT-2019-BLG-2974 Lev 17 51 24.500 -29 25 23.38           ~ 2 0
16 KMT-2019-BLG-0253b Pl? 17 51 32.000 -29 33 56.00           ~ 4 0
17 NAME EWS 2017-BLG-0604b ev 17 51 34.00 -30 56 47.6           ~ 5 0
18 OGLE-2019-BLG-0954 * 17 51 39.180 -29 36 39.60           ~ 7 0
19 KMT-2018-BLG-2718 * 17 52 56.080 -30 13 06.28           ~ 3 0
20 OGLE-2018-BLG-0932 * 17 53 24.290 -29 01 18.50           ~ 4 0
21 OGLE-2018-BLG-1126 * 17 53 25.410 -31 43 28.99           ~ 4 0
22 KMT-2018-BLG-2004 * 17 53 42.580 -30 20 25.26           ~ 3 0
23 OGLE-2019-BLG-0763 * 17 53 50.030 -29 52 38.78           ~ 8 0
24 NAME EWS 2018-BLG-0977b Pl? 17 54 01.000 -30 36 17.00           ~ 6 0
25 KMT-2018-BLG-1996b Pl? 17 54 42.840 -22 49 13.48           ~ 3 0
26 2MASS J17544337-2844214 * 17 54 43.3746243771 -28 44 21.394424553           ~ 6 0
27 KMT-2019-BLG-0414 Lev 17 55 24.700 -21 53 43.94           ~ 3 0
28 OGLE-2018-BLG-1647 * 17 55 50.970 -31 49 01.20           ~ 4 0
29 OGLE-2018-BLG-1544 * 17 56 30.920 -30 24 10.30           ~ 4 0
30 NAME EWS 2017-BLG-1375b ev 17 56 37.17 -30 18 41.1           ~ 6 0
31 KMT-2019-BLG-0953b Pl? 17 57 21.26 -28 40 28.7           ~ 2 0
32 OGLE-2019-BLG-1142 Lev 17 58 22.990 -27 34 00.98           ~ 3 0
33 NAME EWS 2018-BLG-0516b Pl? 17 58 34.000 -31 15 45.00           ~ 5 0
34 NAME EWS 2018-BLG-1269b Pl? 17 58 46.42 -27 37 04.6           ~ 2 0
35 OGLE-2018-BLG-1367 * 17 59 01.350 -29 10 06.10           ~ 3 0
36 OGLE-2018-BLG-1119 Lev 18 00 07.02 -32 22 31.0           ~ 2 0
37 NAME EWS 2019-BLG-1492b Pl? 18 00 23.000 -28 37 52.00           ~ 5 0
38 NAME EWS 2019-BLG-1053b Pl? 18 00 39.93 -27 20 29.7           ~ 7 0
39 KMT-2019-BLG-1042 * 18 02 10.570 -27 34 50.41           ~ 3 0
40 OGLE-2018-BLG-1212 * 18 04 18.630 -28 11 38.70           ~ 3 0
41 NAME Galactic Bulge reg ~ ~           ~ 4309 0

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