Özgür Baştürk
A Holistic and Probabilistic Approach to the Ground-based and Spaceborne Data of HAT-P-19 System
Baştürk, Özgür; Yalçınkaya, S; Esmer, E M; Tanrıverdi, T; Mancini, L; Daylan, T; Southworth, John; Keten, B
Authors
S Yalçınkaya
E M Esmer
T Tanrıverdi
L Mancini
T Daylan
Dr John Taylor j.k.taylor@keele.ac.uk
B Keten
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.
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 11, 2020 |
Online Publication Date | Jun 20, 2020 |
Publication Date | 2020-08 |
Publicly Available Date | Mar 28, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 496 |
Issue | 4 |
Pages | 4174-4190 |
DOI | https://doi.org/10.1093/mnras/staa1758 |
Keywords | planets and satellites: individual: HAT-P-19 b, planetary systems, methods: observational, techniques: photometric, techniques: spectroscopic, techniques : timing, stars: individual: HAT-P-19 |
Publisher URL | https://doi.org/10.1093/mnras/staa1758 |
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