New photometric analysis of five exoplanets: CoRoT-2b, HAT-P-12b, TrES-2b, WASP-12b, and WASP-52b

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dc.authoridOzturk, Oguz/0000-0002-9135-9865
dc.contributor.authorOzturk, Oguz
dc.contributor.authorErdem, Ahmet
dc.date.accessioned2025-01-27T21:03:38Z
dc.date.available2025-01-27T21:03:38Z
dc.date.issued2019
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe report 12, 11, 9, 10, and 8 new transit light curves of CoRoT-2b, HAT-P-12b, TrES-2b, WASP-12b, and WASP-52b, respectively, obtained at Canakkale Onsekiz Mart University Observatory and TUBITAK National Observatory in 2016 and 2017. These transit light curves were analysed using JKTEBOP code. Planetary radii of CoRoT-2b, HAT-P-12b, TrES-2b, WASP-12b, and WASP-52b were found to be 1.41 +/- 0.06 R-J, 0.95 +/- 0.04 R-J, 1.23 +/- 0.07 R-J, 1.82 +/- 0.14 R-J, and 1.22 +/- 0.06 R-J, respectively. The transit ephemerides of these five exoplanets were updated and transit-timing variation analyses were also performed, using the maximum likelihood method (MLM). Most of the Lomb-Scargle (LS) periodograms of the timing residuals do not give any peak above false alarm probability levels. However, LS periodograms of CoRoT-2b show several significant peaks, and they are probably due to the magnetic activity of the host star and additional bodies in the system. On the other hand, the O-C diagram of WASP-12b displays a downward parabolic variation and indicates that the orbital period of the exoplanet is secularly decreasing. The mechanism responsible for this period decrease is discussed in terms of the orbital decay model. The tidal quality parameter Q(star)' of the host star WASP-12 was found to be (1.75 +/- 0.16) x10(5), which is close to theoretical predictions for sun-like stars. Classification of the five exoplanets based on their equilibrium temperatures and Safronov numbers was re-examined, comparing the sensitive data of 211 well-known exoplanets from the Exoplanet Data Explorer data base with ours.
dc.description.sponsorshipTUBITAK (Scientific and Technological Research Council of Turkey) [113F353]; TUBITAK; TUBITAK National Observatory (TUG) [1024]; Canakkale Onsekiz Mart University's Astrophysics Research Centre; Istanbul University's Observatory Research Center; Scientific Research Project Coordination Unit of Istanbul University [3685]; Canakkale Onsekiz Mart University's Ulupinar Observatory
dc.description.sponsorshipThe authors appreciate the valuable suggestions given by reviewer for improving the overall quality of the manuscript. This research was supported by TUBITAK (Scientific and Technological Research Council of Turkey) under Grant No. 113F353. The study was also partly supported by TUBITAK for a Doctoral Fellowship Award and forms part of the PhD thesis of Oguz Ozturk. We further thank TUBITAK National Observatory (TUG) for partial support in use of their T100 telescope under Project No. 1024. We are most grateful to Canakkale Onsekiz Mart University's Astrophysics Research Centre and Ulupinar Observatory, and also to Istanbul University's Observatory Research Center for their support and allowing use of their T60 telescope. This was supported partly by the Scientific Research Project Coordination Unit of Istanbul University (Project No. 3685). This research used the Exoplanet Orbit Database and Exoplanet Data Explorer at exoplanets. org. We also thank Mr. G.H. Lee for checking the English.
dc.identifier.doi10.1093/mnras/stz747
dc.identifier.endpage2307
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85067932191
dc.identifier.scopusqualityQ1
dc.identifier.startpage2290
dc.identifier.urihttps://doi.org/10.1093/mnras/stz747
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27379
dc.identifier.volume486
dc.identifier.wosWOS:000474899400063
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherOxford Univ Press
dc.relation.ispartofMonthly Notices of The Royal Astronomical Society
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjecttechniques: photometric
dc.subjectstars: individual: CoRoT-2, HAT-P-12, TrES-2, WASP-12 and WASP-52
dc.subjectplanetary systems
dc.titleNew photometric analysis of five exoplanets: CoRoT-2b, HAT-P-12b, TrES-2b, WASP-12b, and WASP-52b
dc.typeArticle

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