2023A&A...676A..97H

Query : 2023A&A...676A..97H

2023A&A...676A..97H - Astronomy and Astrophysics, volume 676A97 (2023/8-1)

KMT-2022-BLG-0475Lb and KMT-2022-BLG-1480Lb: Microlensing ice giants detected via the non-caustic-crossing channel.

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

Abstract (from CDS):

Aims. We investigate the microlensing data collected in the 2022 season from high-cadence microlensing surveys in order to find weak signals produced by planetary companions to lenses.
Methods. From these searches, we find that two lensing events, KMT-2022-BLG-0475 and KMT-2022-BLG-1480, exhibit weak short-term anomalies. From a detailed modeling of the lensing light curves, we determine that the anomalies are produced by planetary companions with a mass ratio to the primary of q ~ 1.8 × 10–4 for KMT-2022-BLG-0475L and q ~ 4.3 × 10–4 for KMT-2022-BLG-1480L.
Results. We estimate that the host and planet masses and the projected planet-host separation are (Mh/M⊙, Mp/MU, a⊥/au) = (0.43–0.23+0.35, 1.73–0.92+1.42, 2.03–0.38+0.25) for KMT-2022-BLG-0475L and (0.18–0.09+0.16, 1.82–0.92+1.60, 1.22–0.14+0.15) for KMT-2022-BLG-1480L, where MU denotes the mass of Uranus. The two planetary systems have some characteristics in common: the primaries of the lenses are early-mid M dwarfs that lie in the Galactic bulge, and the companions are ice giants that lie beyond the snow lines of the planetary systems.

Abstract Copyright: © The Authors 2023

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

Simbad objects: 5

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Number of rows : 5
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-2022-BLG-1480 Lev 17 58 54.960 -29 28 23.99           ~ 5 0
2 KMT-2022-BLG-1480b Pl? 17 58 54.960 -29 28 23.99           ~ 2 0
3 KMT-2022-BLG-0475 Lev 18 05 20.560 -27 02 15.61           ~ 6 0
4 KMT-2022-BLG-0475b Pl? 18 05 20.560 -27 02 15.61           ~ 2 0
5 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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