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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

A Holistic and Probabilistic Approach to the Ground-based and Spaceborne Data of HAT-P-19 System Thumbnail


Özgür Baştürk

S Yalçınkaya

E M Esmer

T Tanrıverdi

L Mancini

T Daylan

B Keten


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
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
Keywords planets and satellites: individual: HAT-P-19 b, planetary systems, methods: observational, techniques: photometric, techniques: spectroscopic, techniques : timing, stars: individual: HAT-P-19
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