Examining the orbital decay targets KELT-9 b, KELT-16 b and WASP-4 b, and the transit-timing variations of HD 97658 b
Examining the orbital decay targets KELT-9 b, KELT-16 b and WASP-4 b, and the transit-timing variations of HD 97658 b
idal orbital decay is suspected to occur especially for hot Jupiters, withthe only observationally confirmed case of this being WASP-12 b. By examiningthis effect, information on the properties of the host star can be obtainedusing the so-called stellar modified tidal quality factor $Q_*'$, whichdescribes the efficiency with which kinetic energy of the planet is dissipatedwithin the star. This can help to get information about the interior of thestar. In this study, we aim to improve constraints on the tidal decay of theKELT-9, KELT-16 and WASP-4 systems, to find evidence for or against thepresence of this particular effect. With this, we want to constrain each star'srespective $Q_*'$ value. In addition to that, we also aim to test the existenceof the transit timing variations (TTVs) in the HD 97658 system, whichpreviously favoured a quadratic trend with increasing orbital period. Makinguse of newly acquired photometric observations from CHEOPS and TESS, combinedwith archival transit and occultation data, we use Markov chain Monte Carlo(MCMC) algorithms to fit three models, a constant period model, an orbitaldecay model, and an apsidal precession model, to the data. We find that theKELT-9 system is best described by an apsidal precession model for now, with anorbital decay trend at over 2 $\sigma$ being a possible solution as well. AKeplerian orbit model with a constant orbital period fits the transit timingsof KELT-16 b the best due to the scatter and scale of their error bars. TheWASP-4 system is represented the best by an orbital decay model at a 5 $\sigma$significance, although apsidal precession cannot be ruled out with the presentdata. For HD 97658 b, using recently acquired transit observations, we find noconclusive evidence for a previously suspected strong quadratic trend in thedata.
idal orbital decay is suspected to occur especially for hot Jupiters, withthe only observationally confirmed case of this being WASP-12 b. By examiningthis effect, information on the properties of the host star can be obtainedusing the so-called stellar modified tidal quality factor $Q_*'$, whichdescribes the efficiency with which kinetic energy of the planet is dissipatedwithin the star. This can help to get information about the interior of thestar. In this study, we aim to improve constraints on the tidal decay of theKELT-9, KELT-16 and WASP-4 systems, to find evidence for or against thepresence of this particular effect. With this, we want to constrain each star'srespective $Q_*'$ value. In addition to that, we also aim to test the existenceof the transit timing variations (TTVs) in the HD 97658 system, whichpreviously favoured a quadratic trend with increasing orbital period. Makinguse of newly acquired photometric observations from CHEOPS and TESS, combinedwith archival transit and occultation data, we use Markov chain Monte Carlo(MCMC) algorithms to fit three models, a constant period model, an orbitaldecay model, and an apsidal precession model, to the data. We find that theKELT-9 system is best described by an apsidal precession model for now, with anorbital decay trend at over 2 $\sigma$ being a possible solution as well. AKeplerian orbit model with a constant orbital period fits the transit timingsof KELT-16 b the best due to the scatter and scale of their error bars. TheWASP-4 system is represented the best by an orbital decay model at a 5 $\sigma$significance, although apsidal precession cannot be ruled out with the presentdata. For HD 97658 b, using recently acquired transit observations, we find noconclusive evidence for a previously suspected strong quadratic trend in thedata.
L. M. Serrano、A. E. Simon、N. M. Rosário、N. C. Santos、R. Ragazzoni、S. Seager、R. Ottensamer、S. Salmon、J. Cabrera、K. G. Isaak、K. Heng、V. Adibekyan、B. Wohler、J. N. Winn、M. Fridlund、Y. Alibert、M. J. Hooton、V. Van Grootel、A. Bonfanti、M. Lendl、M. Beck、N. A. Walton、S. Udry、A. Luntzer、G. Anglada、E. Pallé、C. Hellier、A. Erikson、D. Gandolfi、T. G. Wilson、G. Piotto、G. Scandariato、L. Fossati、M. Güdel、B. Akinsanmi、T. Beck、C. Lovis、A. M. S. Smith、S. C. C. Barros、D. Magrin、S. G. Sousa、G. R. Ricker、D. Pollacco、H. -G. Florén、M. Deleuil、G. Boué、J. Laskar、V. Nascimbeni、O. D. S. Demangeon、S. Charnoz、N. Billot、P. F. L. Maxted、L. Delrez、L. L. Kiss、Gy. M. Szabó、B. Ulmer、D. R. Anderson、M. Steller、A. Collier Cameron、I. Pagano、G. Peter、T. Bárczy、N. Thomas、Sz. Csizmadia、M. B. Davies、I. Ribas、G. Olofsson、M. Gillon、K. Jones、J. -V. Harre、D. Ehrenreich、W. Benz、S. Hoyer、A. Fortier、B. -O. Demory、R. Alonso、D. Queloz、H. Rauer、A. Lecavelier des Etangs、J. Asquier、F. Biondi、W. Baumjohann、C. M. Persson、D. Ségransan、C. Broeg、V. Cessa、N. Rando、D. Barrado y Navascues、X. Bonfils、A. Brandeker
天文学
L. M. Serrano,A. E. Simon,N. M. Rosário,N. C. Santos,R. Ragazzoni,S. Seager,R. Ottensamer,S. Salmon,J. Cabrera,K. G. Isaak,K. Heng,V. Adibekyan,B. Wohler,J. N. Winn,M. Fridlund,Y. Alibert,M. J. Hooton,V. Van Grootel,A. Bonfanti,M. Lendl,M. Beck,N. A. Walton,S. Udry,A. Luntzer,G. Anglada,E. Pallé,C. Hellier,A. Erikson,D. Gandolfi,T. G. Wilson,G. Piotto,G. Scandariato,L. Fossati,M. Güdel,B. Akinsanmi,T. Beck,C. Lovis,A. M. S. Smith,S. C. C. Barros,D. Magrin,S. G. Sousa,G. R. Ricker,D. Pollacco,H. -G. Florén,M. Deleuil,G. Boué,J. Laskar,V. Nascimbeni,O. D. S. Demangeon,S. Charnoz,N. Billot,P. F. L. Maxted,L. Delrez,L. L. Kiss,Gy. M. Szabó,B. Ulmer,D. R. Anderson,M. Steller,A. Collier Cameron,I. Pagano,G. Peter,T. Bárczy,N. Thomas,Sz. Csizmadia,M. B. Davies,I. Ribas,G. Olofsson,M. Gillon,K. Jones,J. -V. Harre,D. Ehrenreich,W. Benz,S. Hoyer,A. Fortier,B. -O. Demory,R. Alonso,D. Queloz,H. Rauer,A. Lecavelier des Etangs,J. Asquier,F. Biondi,W. Baumjohann,C. M. Persson,D. Ségransan,C. Broeg,V. Cessa,N. Rando,D. Barrado y Navascues,X. Bonfils,A. Brandeker.Examining the orbital decay targets KELT-9 b, KELT-16 b and WASP-4 b, and the transit-timing variations of HD 97658 b[EB/OL].(2023-02-19)[2025-08-02].https://chinaxiv.org/abs/202303.04994.点此复制
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