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

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; P. Spyratos

doi:10.1093/mnras/stac1931

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

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. KorhonenL. Mancini, N. Peixinho, S. Rahvar, M. Rabus, J. Skottfelt, P. Spyratos

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

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′⋆>105.11±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.

Original language	English
Pages (from-to)	3212-3223
Number of pages	12
Journal	Monthly Notices of the Royal Astronomical Society
Volume	515
Issue number	3
Early online date	12 Jul 2022
DOIs	https://doi.org/10.1093/mnras/stac1931
Publication status	Published - 1 Sept 2022

Keywords / Materials (for Non-textual outputs)

planetary systems
stars: fundamental parameters
stars: individual: HATS-18

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10.1093/mnras/stac1931

2207.05873v1Accepted author manuscript, 2.55 MBLicence: Creative Commons: Attribution (CC-BY)

https://arxiv.org/abs/2207.05873Licence: Creative Commons: Attribution (CC-BY)

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Southworth, J., Barker, A. J., Hinse, T. C., Jongen, Y., Dominik, M., Jørgensen, U. G., Longa-Peña, P., Sajadian, S., Snodgrass, C., Tregloan-Reed, J., Bach-Møller, N., Bonavita, M., Bozza, V., Burgdorf, M. J., Jaimes, R. F., Helling, C., Hitchcock, J. A., Hundertmark, M., Khalouei, E., ... Spyratos, P. (2022). A search for transit timing variations in the HATS-18 planetary system. Monthly Notices of the Royal Astronomical Society , 515(3), 3212-3223. https://doi.org/10.1093/mnras/stac1931

@article{3d6985d3d1364de0b0cb3656bddc4759,

title = "A search for transit timing variations in the HATS-18 planetary system",

abstract = "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′⋆>105.11±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.",

keywords = "planetary systems, stars: fundamental parameters, stars: individual: HATS-18",

author = "John Southworth and Barker, {A. J.} and Hinse, {T. C.} and Y. Jongen and M. Dominik and J{\o}rgensen, {U. G.} and P. Longa-Pe{\~n}a and S. Sajadian and C. Snodgrass and J. Tregloan-Reed and N. Bach-M{\o}ller and M. Bonavita and V. Bozza and Burgdorf, {M. J.} and Jaimes, {R. Figuera} and Ch Helling and Hitchcock, {J. A.} and M. Hundertmark and E. Khalouei and H. Korhonen and L. Mancini and N. Peixinho and S. Rahvar and M. Rabus and J. Skottfelt and P. Spyratos",

note = "Accepted for publication in MNRAS. 12 pages, 4 tables, 6 figures. This is the authors' version of the accepted paper Publisher Copyright: {\textcopyright} 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2022",

month = sep,

day = "1",

doi = "10.1093/mnras/stac1931",

language = "English",

volume = "515",

pages = "3212--3223",

journal = "Monthly Notices of the Royal Astronomical Society ",

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Southworth, J, Barker, AJ, Hinse, TC, Jongen, Y, Dominik, M, Jørgensen, UG, Longa-Peña, P, Sajadian, S, Snodgrass, C, Tregloan-Reed, J, Bach-Møller, N, Bonavita, M, Bozza, V, Burgdorf, MJ, Jaimes, RF, Helling, C, Hitchcock, JA, Hundertmark, M, Khalouei, E, Korhonen, H, Mancini, L, Peixinho, N, Rahvar, S, Rabus, M, Skottfelt, J & Spyratos, P 2022, 'A search for transit timing variations in the HATS-18 planetary system', Monthly Notices of the Royal Astronomical Society , vol. 515, no. 3, pp. 3212-3223. https://doi.org/10.1093/mnras/stac1931

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 - Jørgensen, U. G.

AU - Longa-Peña, P.

AU - Sajadian, S.

AU - Snodgrass, C.

AU - Tregloan-Reed, J.

AU - Bach-Møller, 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.

N1 - Accepted for publication in MNRAS. 12 pages, 4 tables, 6 figures. This is the authors' version of the accepted paper Publisher Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

PY - 2022/9/1

Y1 - 2022/9/1

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′⋆>105.11±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′⋆>105.11±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 - planetary systems

KW - stars: fundamental parameters

KW - stars: individual: HATS-18

U2 - 10.1093/mnras/stac1931

DO - 10.1093/mnras/stac1931

M3 - Article

SN - 0035-8711

VL - 515

SP - 3212

EP - 3223

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

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

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Keywords / Materials (for Non-textual outputs)

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