OGLE-2014-BLG-1760: A Jupiter-Sun Analogue Residing in the Galactic Bulge

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dc.citation.issue3
dc.citation.volume170
dc.contributor.authorRektsini NE
dc.contributor.authorRanc C
dc.contributor.authorKoshimoto N
dc.contributor.authorBeaulieu J-P
dc.contributor.authorBennett DP
dc.contributor.authorCole AA
dc.contributor.authorTerry SK
dc.contributor.authorBhattacharya A
dc.contributor.authorBachelet É
dc.contributor.authorBond IA
dc.contributor.authorUdalski A
dc.contributor.authorBlackman JW
dc.contributor.authorVandorou A
dc.contributor.authorPlunkett TJ
dc.contributor.authorMarquette J-B
dc.date.accessioned2025-09-22T20:31:05Z
dc.date.available2025-09-22T20:31:05Z
dc.date.issued2025-09-01
dc.description.abstractWe present the analysis of OGLE-2014-BLG-1760, a planetary system in the galactic bulge. We combine Keck Adaptive Optics follow-up observations in K-band with re-reduced light-curve data to confirm the source and lens star identifications and stellar types. The re-reduced Microlensing Observations in Astrophysics data set had an important impact on the light-curve model. We find the Einstein ring crossing time of the event to be ∼2.5 days shorter than previous fits, which increases the planetary mass-ratio and decreases the source angular size by a factor of 0.25. Our OSIRIS images obtained 6 yr after the peak of the event show a source-lens separation of 54.20 ± 0.23 mas, which leads to a relative proper motion of μrel = 9.14 ± 0.05 mas yr−1 and is larger than the previous light-curve-only models. Our analysis shows that the event consists of a Jupiter-mass planet of Mp = 0.931 ± 0.117 MJup orbiting a K-dwarf star of M* = 0.803 ± 0.097 M⊙ with a K-magnitude of KL = 18.30 ± 0.05, located in the galactic bulge or bar. We also attempt to constrain the source properties using the source angular size θ* and K-magnitude. Our results favor the scenario of the source being a younger star in the galactic disk, behind the galactic bulge, but future multicolor observations are needed to constrain the source and thus the lens properties.
dc.description.confidentialfalse
dc.identifier.citationRektsini NE, Ranc C, Koshimoto N, Beaulieu JP, Bennett DP, Cole AA, Terry SK, Bhattacharya A, Bachelet É, Bond IA, Udalski A, Blackman JW, Vandorou A, Plunkett TJ, Marquette JB. (2025). OGLE-2014-BLG-1760: A Jupiter-Sun Analogue Residing in the Galactic Bulge. Astronomical Journal. 170. 3.
dc.identifier.doi10.3847/1538-3881/adf641
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6256
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/73595
dc.languageEnglish
dc.publisherIOP Publishing on behalf of The American Astronomical Society
dc.publisher.urihttp://iopscience.iop.org/article/10.3847/1538-3881/adf641
dc.relation.isPartOfAstronomical Journal
dc.rights(c) 2025 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleOGLE-2014-BLG-1760: A Jupiter-Sun Analogue Residing in the Galactic Bulge
dc.typeJournal article
pubs.elements-id503251
pubs.organisational-groupOther
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