Artykuł w czasopiśmie
Brak miniatury
Licencja
 

KMT-2018-BLG-1025Lb: microlensing super-Earth planet orbiting a low-mass star

Uproszczony widok
cris.lastimport.scopus2024-02-12T20:22:08Z
dc.abstract.enAims: We aim to find missing microlensing planets hidden in the unanalyzed lensing events of previous survey data. Methods: For this purpose, we conducted a systematic inspection of high-magnification microlensing events, with peak magnifications of A<SUB>peak</SUB> ≳ 30, in the data collected from high-cadence surveys in and before the 2018 season. From this investigation, we identified an anomaly in the lensing light curve of the event KMT-2018-BLG-1025. The analysis of the light curve indicates that the anomaly is caused by a very low mass-ratio companion to the lens. Results: We identify three degenerate solutions, in which the ambiguity between a pair of solutions (solutions B) is caused by the previously known close-wide degeneracy, and the degeneracy between these and the other solution (solution A) is a new type that has not been reported before. The estimated mass ratio between the planet and host is q ~ 0.8 × 10<SUP>‒4</SUP> for solution A and q ~ 1.6 × 10<SUP>‒4</SUP> for solutions B. From the Bayesian analysis conducted with measured observables, we estimate that the masses of the planet and host and the distance to the lens are (M<SUB>p</SUB>, M<SUB>h</SUB>, D<SUB>L</SUB>) ~ (6.1 M<SUB>⊕</SUB>, 0.22 M<SUB>⊙</SUB>, 6.7 kpc) for solution A and ~(4.4 M<SUB>⊕</SUB>, 0.08 M<SUB>⊙</SUB>, 7.5 kpc) for solutions B. The planet mass is in the category of a super-Earth regardless of the solutions, making the planet the eleventh super-Earth planet, with masses lying between those of Earth and the Solar System's ice giants, which were discovered by microlensing. Photometric data are only available at the CDS via anonymous ftp to <A href=http://cdsarc.u-strasbg.fr>cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href=http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/649/A90>http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/649/A90</A>
dc.affiliationUniwersytet Warszawski
dc.contributor.authorHan, Cheongho
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorLee, Chung-Uk
dc.contributor.authorAlbrow, Michael D.
dc.contributor.authorChung, Sun-Ju
dc.contributor.authorGould, Andrew
dc.contributor.authorHwang, Kyu-Ha
dc.contributor.authorJung, Youn Kil
dc.contributor.authorKim, Doeon
dc.contributor.authorKim, Hyoun-Woo
dc.contributor.authorRyu, Yoon-Hyun
dc.contributor.authorShin, In-Gu
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorZang, Weicheng
dc.contributor.authorCha, Sang-Mok
dc.contributor.authorKim, Dong-Jin
dc.contributor.authorKim, Seung-Lee
dc.contributor.authorLee, Dong-Joo
dc.contributor.authorLee, Yongseok
dc.contributor.authorPark, Byeong-Gon
dc.contributor.authorPogge, Richard W.
dc.contributor.authorKim, Chun-Hwey
dc.contributor.authorKim, Woong-Tae
dc.contributor.authorMróz, Przemysław
dc.contributor.authorSzymański, Michał
dc.contributor.authorSkowron, Jan
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSoszyński, Igor
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorIwanek, Patryk
dc.contributor.authorWrona, Marcin
dc.date.accessioned2024-01-25T04:48:02Z
dc.date.available2024-01-25T04:48:02Z
dc.date.copyright2021-02-03
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.versionORIGINAL_AUTHOR
dc.description.volume649
dc.identifier.doi10.1051/0004-6361/202039817
dc.identifier.issn0004-6361
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/110409
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021A&A...649A..90H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.pagesA90
dc.rightsOther
dc.sciencecloudnosend
dc.titleKMT-2018-BLG-1025Lb: microlensing super-Earth planet orbiting a low-mass star
dc.typeJournalArticle
dspace.entity.typePublication