Southworth, J, Barker, AJ orcid.org/0000-0003-4397-7332, Hinse, TC et al. (23 more authors) (2022) A search for transit timing variations in the HATS-18 planetary system. Monthly Notices of the Royal Astronomical Society, 515 (3). pp. 3212-3223. ISSN 0035-8711
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Author(s). Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | stars: fundamental parameters; stars: individual: HATS-18; planetary systems |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Funding Information: | Funder Grant number STFC (Science and Technology Facilities Council) ST/W000873/1 STFC (Science and Technology Facilities Council) ST/S000275/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Jul 2022 10:10 |
Last Modified: | 04 Apr 2023 22:20 |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/mnras/stac1931 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:188799 |