A search for transit timing variations in the HATS-18 planetary system
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A search for transit timing variations in the HATS-18 planetary system. / Southworth, John; Barker, A. J.; Hinse, T. C.; Jongen, Y.; Dominik, M.; Jorgensen, U. G.; Longa-Pena, P.; Sajadian, S.; Snodgrass, C.; Tregloan-Reed, J.; Bach-Moller, N.; Bonavita, M.; Bozza, V.; Burgdorf, M. J.; Jaimes, R. Figuera; Helling, Ch; Hitchcock, J. A.; Hundertmark, M.; Khalouei, E.; Korhonen, H.; Mancini, L.; Peixinho, N.; Rahvar, S.; Rabus, M.; Skottfelt, J.; Spyratos, P.
In: Monthly Notices of the Royal Astronomical Society, Vol. 515, No. 3, 04.08.2022, p. 3212-3223.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A search for transit timing variations in the HATS-18 planetary system
AU - Southworth, John
AU - Barker, A. J.
AU - Hinse, T. C.
AU - Jongen, Y.
AU - Dominik, M.
AU - Jorgensen, U. G.
AU - Longa-Pena, P.
AU - Sajadian, S.
AU - Snodgrass, C.
AU - Tregloan-Reed, J.
AU - Bach-Moller, N.
AU - Bonavita, M.
AU - Bozza, V.
AU - Burgdorf, M. J.
AU - Jaimes, R. Figuera
AU - Helling, Ch
AU - Hitchcock, J. A.
AU - Hundertmark, M.
AU - Khalouei, E.
AU - Korhonen, H.
AU - Mancini, L.
AU - Peixinho, N.
AU - Rahvar, S.
AU - Rabus, M.
AU - Skottfelt, J.
AU - Spyratos, P.
PY - 2022/8/4
Y1 - 2022/8/4
N2 - 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(*)' > 10(15.11 +/- 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.
AB - 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(*)' > 10(15.11 +/- 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.
KW - stars: fundamental parameters
KW - stars: individual: HATS-18
KW - planetary systems
KW - HIGH-PRECISION PHOTOMETRY
KW - STELLAR ATMOSPHERE MODELS
KW - INTERNAL WAVE BREAKING
KW - LIMB-DARKENING LAW
KW - TIDAL DISSIPATION
KW - EXTRASOLAR PLANETS
KW - CONVECTIVE BOUNDARIES
KW - GLOBAL DYNAMICS
KW - ORBITAL DECAY
KW - EVOLUTION
U2 - 10.1093/mnras/stac1931
DO - 10.1093/mnras/stac1931
M3 - Journal article
VL - 515
SP - 3212
EP - 3223
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 3
ER -
ID: 316865317