Dr. Rabus, Markus

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Nombre de publicaciĂ³n
Dr. Rabus, Markus
Nombre completo
Rabus, Markus
Facultad
Email
mrabus@ucsc.cl
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Has files: false Ă— Subject: Stars: fundamental parameters Ă—

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    Publication
    A search for transit timing variations in the HATS-18 planetary system
    (Monthly Notices of the Royal Astronomical Society, 2022)
    Southworth, John
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    Barker, A. J.
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    Hinse, T. C.
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    Jongen, Y.
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    Dominik, M.
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    Jørgensen, U. G.
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    Longa-Peña, P.
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    Sajadian, S.
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    Snodgrass, C.
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    Tregloan-Reed, J.
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    Bach-Møller, N.
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    Bonavita, M.
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    Bozza, V.
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    Burgdorf, M. J.
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    Jaimes, R. Figuera
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    Helling, Ch.
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    Hitchcock, J. A.
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    Hundertmark, M.
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    Khalouei, E.
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    Korhonen, H.
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    Mancini, L.
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    Peixinho, N.
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    Rahvar, S.
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    Rabus, Markus 
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    Skottfelt, J.
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    Spyratos, P.
    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 e xtensiv e 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 5 . 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.