A Combined TESS and Ground-based Study of Transit Timing Variations in HAT-P-16, TOI-1516 and TOI-2046 Systems

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dc.authorid0000-0002-9314-0648
dc.authorid0000-0002-6909-192X
dc.authorid0000-0002-5274-6790
dc.authorid0000-0003-0631-1961
dc.contributor.authorSonbas, E.
dc.contributor.authorKaplan, K.
dc.contributor.authorTanriver, M.
dc.contributor.authorKeskin, A.
dc.contributor.authorDhuga, K.
dc.contributor.authorBulut, A.
dc.contributor.authorGogus, E.
dc.date.accessioned2026-02-03T11:59:46Z
dc.date.available2026-02-03T11:59:46Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe present new results for the hot Jupiters HAT-P-16b, TOI-1516b, and TOI-2046b, based on photometric observations collected using both space- and ground-based facilities. Ground-based data were collected in the 2020-2024 time span with the 0.6 m telescope (ADYU60) located at the Adiyaman University Application and Research Center (Adiyaman, T & uuml;rkiye) and the 1.0 m telescope at the T & uuml;rkiye National Observatory (TUG, T & uuml;rkiye). Through a combination of fits to our ground-based data, the midtransit times data from TESS, and additional data taken from the literature, we present an updated linear ephemeris for each system. Transit timing variations (TTVs) were analyzed using linear, orbital decay, and apsidal precession models. The resulting BIC(Delta BIC) values indicate that the orbital decay model is statistically favored for HAT-P-16b and TOI-1516b, while the constant period model is preferred for TOI-2046b. False alarm probabilities (FAPs) were computed to assess the significance of any periodic signals. TOI-1516b displays a strong TTV signal with a FAP (of 0.0001) well below the 0.01 threshold, suggesting a likely dynamical origin that warrants further investigation. The higher FAP value (0.0055) for HAT-P-16b suggests that the case of a possible presence of an additional body in the system is less convincing. In contrast, the much higher FAP value (0.0196) for TOI-2046b implies that there are no statistically significant TTVs.
dc.description.sponsorshipAdiyaman University Astrophysics Application and Research Center
dc.description.sponsorshipWe thank the Adiyaman University Astrophysics Application and Research Center for their support in the acquisition of data with the ADYU60 telescope. We also thank the Turkiye National Observatories for partial observational support using the T100 telescope with project number 18AT100-1300. Some of the data presented in this article were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed can be accessed via DOI:10.17909/txjq-nk46.
dc.identifier.doi10.3847/1538-3881/ae0f19
dc.identifier.issn0004-6256
dc.identifier.issn1538-3881
dc.identifier.issue6
dc.identifier.urihttps://doi.org/10.3847/1538-3881/ae0f19
dc.identifier.urihttps://hdl.handle.net/20.500.12428/34416
dc.identifier.volume170
dc.identifier.wosWOS:001619955400001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofAstronomical Journal
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20260130
dc.subjectChain Monte-Carlo
dc.subjectHot Jupiter
dc.subjectOrbital Decay
dc.subjectGiant Planets
dc.subjectCompanion
dc.subjectStars
dc.subjectConstraints
dc.subjectPeriodogram
dc.subjectMigration
dc.titleA Combined TESS and Ground-based Study of Transit Timing Variations in HAT-P-16, TOI-1516 and TOI-2046 Systems
dc.typeArticle

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