Baştürk, Ö, Yalçınkaya, S, Esmer, EM, Tanrıverdi, T, Mancini, L, Daylan, T, Southworth, J ORCID: https://orcid.org/0000-0002-3807-3198 and Keten, B (2020) A Holistic and Probabilistic Approach to the Ground-based and Spaceborne Data of HAT-P-19 System. Monthly Notices of the Royal Astronomical Society.

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Abstract

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 broadband photometry, and Gaia parallax. We collected 65 light curves by amateur and professional observers, measured mid-transit times, analyzed their differences from calculated transit timings based on reference ephemeris information, which we update as a result. We haven’t 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 seventy transiting Saturn-mass planets from the NASA Exoplanet Archive.

Item Type: Article
Uncontrolled Keywords: planets and satellites: individual: HAT-P-19 b, planetary systems, methods: observational, techniques: photometric, techniques: spectroscopic, techniques : timing, stars: individual: HAT-P-19
Subjects: Q Science > Q Science (General)
Q Science > QB Astronomy
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 07 Jul 2020 14:23
Last Modified: 07 Jul 2020 14:23
URI: https://eprints.keele.ac.uk/id/eprint/8346

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