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Transit timing variations in the WASP-4 planetary system
| Content Provider | Semantic Scholar |
|---|---|
| Author | Southworth, John B. Dominik, Martin Jørgensen, Uffe Gråe Andersen, Michael Bozza, Valerio Burgdorf, Martin D'ago, Giuseppe Dib, Sami Jaimes, Roberto Figuera Fujii, Yuri I. Gill, Samuel Haikala, Lauri Kristian Hinse, Tobias Cornelius Hundertmark, Markus Khalouei, E. Korhonen, Hannele Longa-Pena, Pen'elope Mancini, Luigi Peixinho, Nuno Rabus, Markus Rahvar, Sohrab Sajadian, Sedighe Skottfelt, Jesper Snodgrass, C. Spyratos, P. Tregloan-Reed, Jeremy Unda-Sanzana, Eduardo Essen, Carolina Von |
| Copyright Year | 2019 |
| Abstract | 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. |
| Starting Page | 4230 |
| Ending Page | 4236 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1093/mnras/stz2602 |
| Volume Number | 490 |
| Alternate Webpage(s) | http://oro.open.ac.uk/66973/1/66973.pdf |
| Alternate Webpage(s) | https://www.research.ed.ac.uk/portal/files/113271059/1907.08269.pdf |
| Alternate Webpage(s) | https://oro.open.ac.uk/66973/1/66973.pdf |
| Alternate Webpage(s) | http://export.arxiv.org/pdf/1907.08269 |
| Alternate Webpage(s) | https://www.astro.keele.ac.uk/jkt/pubs/2019MNRAS.490.4230S.pdf |
| Alternate Webpage(s) | https://arxiv.org/pdf/1907.08269v1.pdf |
| Alternate Webpage(s) | https://export.arxiv.org/pdf/1907.08269 |
| Alternate Webpage(s) | https://doi.org/10.1093/mnras%2Fstz2602 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
