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A search for transit timing variations in the HATS-18 planetary system

HATS-18 b is a transiting planet with a large mass and a short orbital period, and is one of the best candidates for the detection of orbital decay induced by tidal effects. We present extensive photometry of HATS-18 from which we measure 27 times of mid-transit. Two further transit times were measu...

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Hauptverfasser: Southworth, John (VerfasserIn) , Barker, A J (VerfasserIn) , Hinse, T C (VerfasserIn) , Jongen, Y (VerfasserIn) , Dominik, M (VerfasserIn) , Jørgensen, U G (VerfasserIn) , Longa-Peña, P (VerfasserIn) , Sajadian, S (VerfasserIn) , Snodgrass, C (VerfasserIn) , Tregloan-Reed, J (VerfasserIn) , Bach-Møller, N (VerfasserIn) , Bonavita, M (VerfasserIn) , Bozza, V (VerfasserIn) , Burgdorf, M J (VerfasserIn) , Figuera Jaimes, R (VerfasserIn) , Helling, Ch (VerfasserIn) , Hitchcock, J A (VerfasserIn) , Hundertmark, Markus (VerfasserIn) , Khalouei, E (VerfasserIn) , Korhonen, H (VerfasserIn) , Mancini, L (VerfasserIn) , Peixinho, N (VerfasserIn) , Rahvar, S (VerfasserIn) , Rabus, M (VerfasserIn) , Skottfelt, J (VerfasserIn) , Spyratos, P (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2022 July 12
In: Monthly notices of the Royal Astronomical Society
Year: 2022, Jahrgang: 515, Heft: 3, Pages: 3212-3223
ISSN:1365-2966
DOI:10.1093/mnras/stac1931
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stac1931
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Verfasserangaben:John Southworth, A.J. Barker, T.C. Hinse, Y. Jongen, M. Dominik, U.G. Jørgensen, P. Longa-Peña, S. Sajadian, C. Snodgrass, J. Tregloan-Reed, N. Bach-Møller, M. Bonavita, V. Bozza, M.J. Burgdorf, R. Figuera Jaimes, Ch. Helling, J.A. Hitchcock, M. Hundertmark, E. Khalouei, H. Korhonen, L. Mancini, N. Peixinho, S. Rahvar, M. Rabus, J. Skottfelt and P. Spyratos
Beschreibung
Zusammenfassung:HATS-18 b is a transiting planet with a large mass and a short orbital period, and is one of the best candidates for the detection of orbital decay induced by tidal effects. We present extensive photometry of HATS-18 from which we measure 27 times of mid-transit. Two further transit times were measured from data from the Transiting Exoplanet Survey Satellite (TESS) and three more taken from the literature. The transit timings were fitted with linear and quadratic ephemerides and an upper limit on orbital decay was determined. This corresponds to a lower limit on the modified stellar tidal quality factor of $Q_\star ^{\, \prime } \gt 10^{5.11 \pm 0.04}$. This is at the cusp of constraining the presence of enhanced tidal dissipation due to internal gravity waves. We also refine the measured physical properties of the HATS-18 system, place upper limits on the masses of third bodies, and compare the relative performance of TESS and the 1.54 m Danish Telescope in measuring transit times for this system.
Beschreibung:Gesehen am 09.03.2023
Beschreibung:Online Resource
ISSN:1365-2966
DOI:10.1093/mnras/stac1931

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