1 Ocak 2020 Dergi makalesi Açık Erişim

Basturk, Ozgur; Yalcinkaya, S.; Esmer, E. M.; Tanriverdi, T.; Mancini, L.; Daylan, T.; Southworth, J.; Keten, B.

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    <subfield code="a">A holistic and probabilistic approach to the ground-based and spaceborne data of HAT-P-19 system</subfield>
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    <subfield code="a">Basturk, Ozgur</subfield>
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    <subfield code="a">We update the main physical and orbital properties of the transiting hot Saturn planet HAT-P-19 b, based on a global modelling of high-precision transit and occultation light curves, taken with ground-based and space telescopes, archive spectra and radial velocity measurements, brightness values from broad-band photometry, and Gaia parallax. We collected 65 light curves by amateur and professional observers, measured mid-transit times, and analysed their differences from calculated transit timings based on reference ephemeris information, which we update as a result. We have not found any periodicity in the residuals of a linear trend, which we attribute to the accumulation of uncertainties in the reference mid-transit time and the orbital period. We comment on the scenarios describing the formation and migration of this hot-Saturn type exoplanet with a bloated atmosphere yet a small core, although it is orbiting a metal-rich ([Fe/H] = 0.24 dex) host star. Finally, we review the planetary mass-radius, the orbital period-radius, and density, and the stellar metallicity-core mass diagrams, based on the parameters we derive for HAT-P-19 b and those of the other 70 transiting Saturn-mass planets from the NASA Exoplanet Archive.</subfield>
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