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Photodynamical analysis of the nearly resonant planetary system WASP-148: Accurate transit-timing variations and mutual orbital inclination by Almenara, J. M.; Hébrard, G.; Díaz, R. F.; Laskar, J.; Correia, A. C. M.; Anderson, D. R.; Boisse, I.; Bonfils, X.; Brown, D. J. A.; Casanova, V.; Cameron, A. Collier; Fernández, M.; Jenkins, J. M.; Kiefer, F.; Étangs, A. Lecavelier des; Lissauer, J. J; Maciejewski, G.; McCormac, J.; Osborn, H.; Pollacco, D.; Ricker, G.; Sánchez, J.; Seager, S.; Udry, S.; Verilhac, D.; Winn, J. is a scholarly article available to read on EtoBox.

What is Photodynamical analysis of the nearly resonant planetary system WASP-148: Accurate transit-timing variations and mutual orbital inclination about?

WASP-148 is a recently announced extra-solar system harbouring at least two giant planets. The inner planet transits its host star. The planets travel on eccentric orbits and are near the 4:1 mean-motion resonance, which implies significant mutual gravitational interactions. In particular, this causes transit-timing variations of a few minutes, which were detected based on ground-based photometry. This made WASP-148 one of the few cases where such a phenomenon was detected without space-based photometry. Here, we present a self-consistent model of WASP-148 that takes into account the gravitational interactions between all known bodies in the system. Our analysis simultaneously fits the available radial velocities and transit light curves. In particular, we used the photometry secured by the TESS space telescope and made public after the WASP-148 discovery announcement. The TESS data confirm the transit-timing variations, but only in combination with previously measured transit times. The system parameters we derived agree with those previously reported and have a significantly improved precision, including the mass of the non-transiting planet. We found a significant mutual inclina

Author

Almenara, J. M.; Hébrard, G.; Díaz, R. F.; Laskar, J.; Correia, A. C. M.; Anderson, D. R.; Boisse, I.; Bonfils, X.; Brown, D. J. A.; Casanova, V.; Cameron, A. Collier; Fernández, M.; Jenkins, J. M.; Kiefer, F.; Étangs, A. Lecavelier des; Lissauer, J. J; Maciejewski, G.; McCormac, J.; Osborn, H.; Pollacco, D.; Ricker, G.; Sánchez, J.; Seager, S.; Udry, S.; Verilhac, D.; Winn, J.

Published

2022

Language

EN