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      Homogeneous transit timing analyses of 10 exoplanet systems

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      Author(s)
      Baştürk, Ö.
      Esmer, E. M.
      Yalçınkaya, S.
      Torun, Ş.
      Mancini, L.
      Helweh, Fadel El
      Karamanlı, Ertuğrul
      Southworth, J.
      Aliş, S.
      Wünsche, A.
      Tezcan, F.
      Aladağ, Y.
      Aksaker, N.
      Tunç, Ege
      Davoudi, F.
      Fişek, S.
      Bretton, M.
      Evans, D. F.
      Yeşilyaprak, C.
      Yılmaz, M.
      Tezcan, C. T.
      Yelkenci, K.
      Date
      2022-03-07
      Source Title
      Monthly Notices of the Royal Astronomical Society
      Print ISSN
      0035-8711
      Electronic ISSN
      1365-2966
      Publisher
      Oxford University Press
      Volume
      512
      Issue
      2
      Pages
      2062 - 2081
      Language
      English
      Type
      Article
      Item Usage Stats
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      4
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      Abstract
      We study the transit timings of 10 exoplanets in order to investigate potential transit timing variations in them. We model their available ground-based light curves, some presented here and others taken from the literature, and homogeneously measure the mid-transit times. We statistically compare our results with published values and find that the measurement errors agree. However, in terms of recovering the possible frequencies, homogeneous sets can be found to be more useful, of which no statistically relevant example has been found for the planets in our study. We corrected the ephemeris information of all 10 planets we studied and provide these most precise light elements as references for future transit observations with space-borne and ground-based instruments. We found no evidence for secular or periodic changes in the orbital periods of the planets in our sample, including the ultra-short period WASP-103 b, whose orbit is expected to decay on an observable time-scale. Therefore, we derive the lower limits for the reduced tidal quality factors (Q) for the host stars based on best-fitting quadratic functions to their timing data. We also present a global model of all available data for WASP-74 b, which has a Gaia parallax-based distance value ∼25 per cent larger than the published value.
      Keywords
      Geometrical optics
      Orbits
      Stars
      Timing circuits
      Hat-P-32
      Hat-P-37
      Hat-P-56
      Methods
      Observational
      Planetary systems
      Individual
      Hat-p-23
      Techniques
      Photometric
      Wasp-103
      Wasp-14
      Wasp-2
      Wasp-37
      Wasp-69
      Wasp-74
      Permalink
      http://hdl.handle.net/11693/111268
      Published Version (Please cite this version)
      https://www.doi.org/10.1093/mnras/stac592
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      • Department of Physics 2550
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