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

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dc.citation.issueAugust 2023
dc.citation.volume676
dc.contributor.authorHan C
dc.contributor.authorLee C-U
dc.contributor.authorBond IA
dc.contributor.authorZang W
dc.contributor.authorChung S-J
dc.contributor.authorAlbrow MD
dc.contributor.authorGould A
dc.contributor.authorHwang K-H
dc.contributor.authorJung YK
dc.contributor.authorRyu Y-H
dc.contributor.authorShin I-G
dc.contributor.authorShvartzvald Y
dc.contributor.authorYang H
dc.contributor.authorYee JC
dc.contributor.authorCha S-M
dc.contributor.authorKim D
dc.contributor.authorKim D-J
dc.contributor.authorKim S-L
dc.contributor.authorLee D-J
dc.contributor.authorLee Y
dc.contributor.authorPark B-G
dc.contributor.authorPogge RW
dc.contributor.authorMao S
dc.contributor.authorZhu W
dc.contributor.authorAbe F
dc.contributor.authorBarry R
dc.contributor.authorBennett DP
dc.contributor.authorBhattacharya A
dc.contributor.authorFujii H
dc.contributor.authorFukui A
dc.contributor.authorHamada R
dc.contributor.authorHirao Y
dc.contributor.authorIshitani Silva S
dc.contributor.authorItow Y
dc.contributor.authorKirikawa R
dc.contributor.authorKondo I
dc.contributor.authorKoshimoto N
dc.contributor.authorMatsubara Y
dc.contributor.authorMiyazaki S
dc.contributor.authorMuraki Y
dc.contributor.authorOlmschenk G
dc.contributor.authorRanc C
dc.contributor.authorRattenbury NJ
dc.contributor.authorSatoh Y
dc.contributor.authorSumi T
dc.contributor.authorSuzuki D
dc.contributor.authorToda T
dc.contributor.authorTomoyoshi M
dc.contributor.authorTristram PJ
dc.contributor.authorVandorou A
dc.contributor.authorYama H
dc.contributor.authorYamashita K
dc.date.accessioned2025-01-07T01:22:18Z
dc.date.available2025-01-07T01:22:18Z
dc.date.issued2023-08
dc.description.abstractAims. 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 A-104 for KMT-2022-BLG-0475L and q 4.3 A-104 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) = (0.430.23+0.35, 1.730.92+1.42, 2.030.38+0.25) for KMT-2022-BLG-0475L and (0.180.09+0.16, 1.820.92+1.60, 1.220.14+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.
dc.description.confidentialfalse
dc.identifier.citationHan C, Lee CU, Bond IA, Zang W, Chung SJ, Albrow MD, Gould A, Hwang KH, Jung YK, Ryu YH, Shin IG, Shvartzvald Y, Yang H, Yee JC, Cha SM, Kim D, Kim DJ, Kim SL, Lee DJ, Lee Y, Park BG, Pogge RW, Mao S, Zhu W, Abe F, Barry R, Bennett DP, 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 NJ, Satoh Y, Sumi T, Suzuki D, Toda T, Tomoyoshi M, Tristram PJ, Vandorou A, Yama H, Yamashita K. (2023). KMT-2022-BLG-0475Lb and KMT-2022-BLG-1480Lb: Microlensing ice giants detected via the non-caustic-crossing channel. Astronomy and Astrophysics. 676. August 2023.
dc.identifier.doi10.1051/0004-6361/202346667
dc.identifier.eissn1432-0746
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6361
dc.identifier.numberA97
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/72325
dc.languageEnglish
dc.publisherEDP Sciences, France
dc.publisher.urihttps://www.aanda.org/articles/aa/full_html/2023/08/aa46667-23/aa46667-23.html
dc.relation.isPartOfAstronomy and Astrophysics
dc.rights(c) 2023 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectplanets and satellites
dc.subjectdetection / gravitational lensing
dc.subjectmicro
dc.titleKMT-2022-BLG-0475Lb and KMT-2022-BLG-1480Lb: Microlensing ice giants detected via the non-caustic-crossing channel
dc.typeJournal article
pubs.elements-id480099
pubs.organisational-groupOther
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