A holistic and probabilistic approach to the ground-based and spaceborne data of HAT-P-19 system

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BAŞTÜRK Ö., YALÇINKAYA S., ESMER E. M., Tanriverdi T., Mancini L., Daylan T., ...Daha Fazla

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.496, sa.4, ss.4174-4190, 2020 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 496 Sayı: 4
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1093/mnras/staa1758
  • Dergi Adı: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, INSPEC, Metadex, zbMATH, DIALNET, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.4174-4190
  • Anahtar Kelimeler: methods: observational, techniques: photometric, techniques: spectroscopic, stars: individual: HAT-P-19, HIGH-PRECISION PHOTOMETRY, HOT JUPITERS, EXOPLANET TRANSITS, PLANETARY SYSTEM, STARS, MIGRATION, ORBITS, RADIUS, MASS, RICH
  • Ankara Üniversitesi Adresli: Evet

Özet

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.