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Journal Article

Transit timing variations in the WASP-4 planetary system*

MPS-Authors

Southworth,  John
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dominik,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jørgensen,  U. G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Andersen,  M. I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bozza,  V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Burgdorf,  M. J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

D'Ago,  G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dib,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jaimes,  R. Figuera
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fujii,  Y. I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gill,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Haikala,  L. K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hinse,  T. C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hundertmark,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Khalouei,  E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Korhonen,  H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Longa-Peña,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mancini,  L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Peixinho,  N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rabus,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rahvar,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sajadian,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Skottfelt,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Snodgrass,  C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Spyratos,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tregloan-Reed,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Unda-Sanzana,  E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

von Essen,  C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019MNRAS.tmp.2234S
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Citation

Southworth, J., Dominik, M., Jørgensen, U. G., Andersen, M. I., Bozza, V., Burgdorf, M. J., et al. (2019). Transit timing variations in the WASP-4 planetary system*. Monthly Notices of the Royal Astronomical Society, 2234.


Cite as: https://hdl.handle.net/21.11116/0000-0005-D244-1
Abstract
Transits in the planetary system WASP-4 were recently found to occur 80 s earlier than expected in observations from the TESS satellite. We present 22 new times of mid-transit that confirm the existence of transit timing variations, and are well fitted by a quadratic ephemeris with period decay dP/dt = -9.2 ± 1.1 ms yr-1. We rule out instrumental issues, stellar activity and the Applegate mechanism as possible causes. The light-time effect is also not favoured due to the non-detection of changes in the systemic velocity. Orbital decay and apsidal precession are plausible but unproven. WASP-4 b is only the third hot Jupiter known to show transit timing variations to high confidence. We discuss a variety of observations of this and other planetary systems that would be useful in improving our understanding of WASP-4 in particular and orbital decay in general.