dc.contributor.author
Harre, J. -V.
dc.contributor.author
Smith, A. M. S.
dc.contributor.author
Barros, S. C. C.
dc.contributor.author
Boué, G.
dc.contributor.author
Csizmadia, Sz.
dc.contributor.author
Ehrenreich, D.
dc.contributor.author
Florén, H.-G.
dc.contributor.author
Fortier, A.
dc.contributor.author
Maxted, P. F. L.
dc.contributor.author
Rauer, Heike
dc.date.accessioned
2023-04-20T06:23:12Z
dc.date.available
2023-04-20T06:23:12Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/38991
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-38707
dc.description.abstract
Context. Tidal orbital decay is suspected to occur for hot Jupiters in particular, with the only observationally confirmed case of this being WASP-12b. By examining this effect, information on the properties of the host star can be obtained using the so-called stellar modified tidal quality factor Q*′, which describes the efficiency with which the kinetic energy of the planet is dissipated within the star. This can provide information about the interior of the star.
Aims. In this study, we aim to improve constraints on the tidal decay of the KELT-9, KELT-16, and WASP-4 systems in order to find evidence for or against the presence of tidal orbital decay. With this, we want to constrain the Q*′ value for each star. In addition, we aim to test the existence of the transit timing variations (TTVs) in the HD 97658 system, which previously favoured a quadratic trend with increasing orbital period.
Methods. Making use of newly acquired photometric observations from CHEOPS (CHaracterising ExOplanet Satellite) and TESS (Transiting Exoplanet Survey Satellite), combined with archival transit and occultation data, we use Markov chain Monte Carlo (MCMC) algorithms to fit three models to the data, namely a constant-period model, an orbital-decay model, and an apsidal-precession model.
Results. We find that the KELT-9 system is best described by an apsidal-precession model for now, with an orbital decay trend at over 2 σ being a possible solution as well. A Keplerian orbit model with a constant orbital period provides the best fit to the transit timings of KELT-16 b because of the scatter and scale of their error bars. The WASP-4 system is best represented by an orbital decay model at a 5 σ significance, although apsidal precession cannot be ruled out with the present data. For HD 97658 b, using recently acquired transit observations, we find no conclusive evidence for a previously suspected strong quadratic trend in the data.
en
dc.format.extent
17 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
planets and satellites: dynamical evolution and stability
en
dc.subject
planet-star interactions
en
dc.subject
techniques: photometric
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften
dc.title
Examining the orbital decay targets KELT-9 b, KELT-16 b, and WASP-4b, and the transit-timing variations of HD 97658 b
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
A124
dcterms.bibliographicCitation.doi
10.1051/0004-6361/202244529
dcterms.bibliographicCitation.journaltitle
Astronomy & Astrophysics
dcterms.bibliographicCitation.volume
669
dcterms.bibliographicCitation.url
https://doi.org/10.1051/0004-6361/202244529
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften / Fachrichtung Planetologie und Fernerkundung
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refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1432-0746
refubium.resourceType.provider
WoS-Alert