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Unveiling MOA-2007-BLG-192: An M Dwarf Hosting a Likely Super-Earth

dc.contributor.authorTERRY, Sean
hal.structure.identifierInstitut d'Astrophysique de Paris [IAP]
dc.contributor.authorBEAULIEU, Jean-Philippe
dc.contributor.authorBENNETT, David
dc.contributor.authorHAMDORF, Euan
dc.contributor.authorBHATTACHARYA, Aparna
dc.contributor.authorCHAUDHRY, Viveka
dc.contributor.authorCOLE, Andrew
dc.contributor.authorKOSHIMOTO, Naoki
dc.contributor.authorANDERSON, Jay
dc.contributor.authorBACHELET, Etienne
dc.contributor.authorBLACKMAN, Joshua
dc.contributor.authorBOND, Ian
dc.contributor.authorLU, Jessica
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorMARQUETTE, Jean Baptiste
dc.contributor.authorRANC, Clément
dc.contributor.authorREKTSINI, Natalia
dc.contributor.authorSAHU, Kailash
dc.contributor.authorVANDOROU, Aikaterini
dc.date.accessioned2024-11-19T03:11:02Z
dc.date.available2024-11-19T03:11:02Z
dc.date.issued2024-07-15
dc.identifier.issn0004-6256
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/203344
dc.description.abstractEnAbstract We present an analysis of high-angular-resolution images of the microlensing target MOA-2007-BLG-192 using Keck adaptive optics and the Hubble Space Telescope. The planetary host star is robustly detected as it separates from the background source star in nearly all of the Keck and Hubble data. The amplitude and direction of the lens–source separation allows us to break a degeneracy related to the microlensing parallax and source radius crossing time. Thus, we are able to reduce the number of possible binary-lens solutions by a factor of ∼2, demonstrating the power of high-angular-resolution follow-up imaging for events with sparse light-curve coverage. Following Bennett et al., we apply constraints from the high-resolution imaging on the light-curve modeling to find host star and planet masses of M host = 0.28 ± 0.04 M ☉ and m p = 12.49 − 8.03 + 65.47 M ⊕ at a distance from Earth of D L = 2.16 ± 0.30 kpc. This work illustrates the necessity for the Nancy Grace Roman Galactic Exoplanet Survey to use its own high-resolution imaging to inform light-curve modeling for microlensing planets that the mission discovers.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.title.enUnveiling MOA-2007-BLG-192: An M Dwarf Hosting a Likely Super-Earth
dc.typeArticle de revue
dc.identifier.doi10.3847/1538-3881/ad5444
dc.subject.halPlanète et Univers [physics]
dc.identifier.arxiv2403.12118
bordeaux.journalThe Astronomical Journal
bordeaux.page72
bordeaux.volume168
bordeaux.hal.laboratoriesLaboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804*
bordeaux.issue2
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-04789834
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04789834v1
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