OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event

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dc.citation.issue3
dc.citation.volume166
dc.contributor.authorSatoh YK
dc.contributor.authorKoshimoto N
dc.contributor.authorBennett DP
dc.contributor.authorSumi T
dc.contributor.authorRattenbury NJ
dc.contributor.authorSuzuki D
dc.contributor.authorMiyazaki S
dc.contributor.authorBond IA
dc.contributor.authorUdalski A
dc.contributor.authorGould A
dc.contributor.authorBozza V
dc.contributor.authorDominik M
dc.contributor.authorHirao Y
dc.contributor.authorKondo I
dc.contributor.authorKirikawa R
dc.contributor.authorHamada R
dc.contributor.authorAbe F
dc.contributor.authorBarry R
dc.contributor.authorBhattacharya A
dc.contributor.authorFujii H
dc.contributor.authorFukui A
dc.contributor.authorFujita K
dc.contributor.authorIkeno T
dc.contributor.authorIshitani Silva S
dc.contributor.authorItow Y
dc.contributor.authorMatsubara Y
dc.contributor.authorMatsumoto S
dc.contributor.authorMuraki Y
dc.contributor.authorNiwa K
dc.contributor.authorOkamura A
dc.contributor.authorOlmschenk G
dc.contributor.authorRanc C
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.contributor.authorMróz P
dc.contributor.authorPoleski R
dc.contributor.authorSkowron J
dc.contributor.authorSzymański MK
dc.contributor.authorPoleski R
dc.contributor.authorSoszyński I
dc.contributor.authorPietrukowicz P
dc.contributor.authorKozłowski S
dc.contributor.authorUlaczyk K
dc.contributor.authorRybicki KA
dc.contributor.authorIwanek P
dc.contributor.authorWrona M
dc.contributor.authorGromadzki M
dc.contributor.authorAlbrow MD
dc.contributor.authorChung S-J
dc.contributor.authorHan C
dc.contributor.authorHwang K-H
dc.contributor.authorKim D
dc.contributor.authorJung YK
dc.contributor.authorKim HW
dc.contributor.authorRyu Y-H
dc.contributor.authorShin I-G
dc.contributor.authorShvartzvald Y
dc.contributor.authorYang H
dc.contributor.authorYee JC
dc.contributor.authorZang W
dc.contributor.authorCha S-M
dc.contributor.authorKim D-J
dc.contributor.authorKim S-L
dc.contributor.authorLee C-U
dc.contributor.authorLee D-J
dc.contributor.authorLee Y
dc.contributor.authorPark B-G
dc.contributor.authorPogge RW
dc.contributor.authorJørgensen UG
dc.contributor.authorLonga-Peña P
dc.contributor.authorSajadian S
dc.contributor.authorSkottfelt J
dc.contributor.authorSnodgrass C
dc.contributor.authorTregloan-Reed J
dc.contributor.authorBach-Møller N
dc.contributor.authorBurgdorf M
dc.contributor.authorD'Ago G
dc.contributor.authorHaikala L
dc.contributor.authorHitchcock J
dc.contributor.authorHundertmark M
dc.contributor.authorKhalouei E
dc.contributor.authorPeixinho N
dc.contributor.authorRahvar S
dc.contributor.authorSouthworth J
dc.contributor.authorSpyratos P
dc.date.accessioned2024-05-08T21:58:55Z
dc.date.available2024-05-08T21:58:55Z
dc.date.issued2023-08-18
dc.description.abstractWe present an analysis of microlensing event OGLE-2019-BLG-0825. This event was identified as a planetary candidate by preliminary modeling. We find that significant residuals from the best-fit static binary-lens model exist and a xallarap effect can fit the residuals very well and significantly improves χ 2 values. On the other hand, by including the xallarap effect in our models, we find that binary-lens parameters such as mass ratio, q, and separation, s, cannot be constrained well. However, we also find that the parameters for the source system such as the orbital period and semimajor axis are consistent between all the models we analyzed. We therefore constrain the properties of the source system better than the properties of the lens system. The source system comprises a G-type main-sequence star orbited by a brown dwarf with a period of P ∼5 days. This analysis is the first to demonstrate that the xallarap effect does affect binary-lens parameters in planetary events. It would not be common for the presence or absence of the xallarap effect to affect lens parameters in events with long orbital periods of the source system or events with transits to caustics, but in other cases, such as this event, the xallarap effect can affect binary-lens parameters.
dc.description.confidentialfalse
dc.edition.editionSeptember 2023
dc.identifier.citationSatoh YK, Koshimoto N, Bennett DP, Sumi T, Rattenbury NJ, Suzuki D, Miyazaki S, Bond IA, Udalski A, Gould A, Bozza V, Dominik M, Hirao Y, Kondo I, Kirikawa R, Hamada R, Abe F, Barry R, Bhattacharya A, Fujii H, Fukui A, Fujita K, Ikeno T, Ishitani Silva S, Itow Y, Matsubara Y, Matsumoto S, Muraki Y, Niwa K, Okamura A, Olmschenk G, Ranc C, Toda T, Tomoyoshi M, Tristram PJ, Vandorou A, Yama H, Yamashita K, Mróz P, Poleski R, Skowron J, Szymański MK, Poleski R, Soszyński I, Pietrukowicz P, Kozłowski S, Ulaczyk K, Rybicki KA, Iwanek P, Wrona M, Gromadzki M, Albrow MD, Chung SJ, Han C, Hwang KH, Kim D, Jung YK, Kim HW, Ryu YH, Shin IG, Shvartzvald Y, Yang H, Yee JC, Zang W, Cha SM, Kim DJ, Kim SL, Lee CU, Lee DJ, Lee Y, Park BG, Pogge RW, Jørgensen UG, Longa-Peña P, Sajadian S, Skottfelt J, Snodgrass C, Tregloan-Reed J, Bach-Møller N, Burgdorf M, D'Ago G, Haikala L, Hitchcock J, Hundertmark M, Khalouei E, Peixinho N, Rahvar S, Southworth J, Spyratos P. (2023). OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event. Astronomical Journal. 166. 3.
dc.identifier.doi10.3847/1538-3881/ace908
dc.identifier.eissn1538-3881
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6256
dc.identifier.number116
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69521
dc.languageEnglish
dc.publisherAmerican Astronomical Society
dc.publisher.urihttps://iopscience.iop.org/article/10.3847/1538-3881/ace908
dc.relation.isPartOfAstronomical Journal
dc.rights(c) The author/sen
dc.rights.licenseCC BY 4.0en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectBrown dwarfs
dc.subjectGravitational microlensing
dc.subjectXallarap
dc.titleOGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event
dc.typeJournal article
pubs.elements-id480738
pubs.organisational-groupOther
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