DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

The Apparent Tidal Decay of WASP-4 b Can Be Explained by the Rømer Effect

Harre, Jan-Vincent and Smith, Alexis M S (2023) The Apparent Tidal Decay of WASP-4 b Can Be Explained by the Rømer Effect. Universe, 9 (12), p. 506. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/universe9120506. ISSN 2218-1997.

[img] PDF - Published version

Official URL: https://www.mdpi.com/2218-1997/9/12/506


Tidal orbital decay plays a vital role in the evolution of hot Jupiter systems. As of now, this has only been observationally confirmed for the WASP-12 system. There are a few other candidates, including WASP-4 b, but no conclusive result could be obtained for these systems as of yet. In this study, we present an analysis of new TESS data of WASP-4 b together with archival data, taking the light–time effect (LTE) induced by the second planetary companion into account as well. We make use of three different Markov chain Monte Carlo models: a circular orbit with a constant orbital period, a circular orbit with a decaying orbit, and an elliptical orbit with apsidal precession. This analysis is repeated for four cases. The first case features no LTE correction, with the remaining three cases featuring three different timing correction approaches because of the large uncertainties of the ephemeris of planet c. Comparison of these models yields no conclusive answer to the cause of WASP-4 b’s apparent transit timing variations. A broad range of values of the orbital decay and apsidal precession parameters are possible, depending on the LTE correction. However, the LTE caused by planet c can explain on its own—in full—the observed transit timing variations of planet b, with no orbital decay or apsidal precession being required at all. This work highlights the importance of continued photometric and spectroscopic monitoring of hot Jupiters.

Item URL in elib:https://elib.dlr.de/201134/
Document Type:Article
Title:The Apparent Tidal Decay of WASP-4 b Can Be Explained by the Rømer Effect
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Harre, Jan-VincentUNSPECIFIEDhttps://orcid.org/0000-0001-8935-2472UNSPECIFIED
Smith, Alexis M SUNSPECIFIEDhttps://orcid.org/0000-0002-2386-4341UNSPECIFIED
Date:5 December 2023
Journal or Publication Title:Universe
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:p. 506
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Special Issue: The Royal Road: Eclipsing Binaries and Transiting Exoplanets
Keywords:exoplanet evolution exoplanet migration tidal interaction photometry transits
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO - PMC and Science
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Harre, Jan-Vincent
Deposited On:19 Dec 2023 08:39
Last Modified:19 Dec 2023 08:39

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.