Characterisation of the Warm-Jupiter TOI-1130 system with CHEOPS and photo-dynamical approach
Abstract
Among the thousands of exoplanets discovered to date, approximately a few hundred gas giants on short-period orbits are classified as "lonely" and only a few are in a multi-planet system with a smaller companion on a close orbit. The processes that formed multi-planet systems hosting gas giants on close orbits are poorly understood, and only a few examples of this kind of system have been observed and well characterised. Within the contest of multi-planet system hosting gas-giant on short orbits, we characterise TOI-1130 system by measuring masses and orbital parameters. This is a 2-transiting planet system with a Jupiter-like planet (c) on a 8.35 days orbit and a Neptune-like planet (b) on an inner (4.07 days) orbit. Both planets show strong anti-correlated transit timing variations (TTVs). Furthermore, radial velocity (RV) analysis showed an additional linear trend, a possible hint of a non-transiting candidate planet on a far outer orbit. Since 2019, extensive transit and radial velocity observations of the TOI-1130 have been acquired using TESS and various ground-based facilities. We present a new photo-dynamical analysis of all available transit and RV data, with the addition of new CHEOPS and ASTEP+ data that achieve the best precision to date on the planetary radii and masses and on the timings of each transit. We were able to model interior structure of planet b constraining the presence of a gaseous envelope of H/He, while it was not possible to assess the possible water content. Furthermore, we analysed the resonant state of the two transiting planets, and we found that they lie just outside the resonant region. This could be the result of the tidal evolution that the system underwent. We obtained both masses of the planets with a precision less than 1.5%, and radii with a precision of about 1% and 3% for planet b and c, respectively.
Keywords
Cite
@article{arxiv.2407.06097,
title = {Characterisation of the Warm-Jupiter TOI-1130 system with CHEOPS and photo-dynamical approach},
author = {L. Borsato and D. Degen and A. Leleu and M. J. Hooton and J. A. Egger and A. Bekkelien and A. Brandeker and A. Collier Cameron and M. N. Günther and V. Nascimbeni and C. M. Persson and A. Bonfanti and T. G. Wilson and A. C. M. Correia and T. Zingales and T. Guillot and A. H. M. J. Triaud and G. Piotto and D. Gandolfi and L. Abe and Y. Alibert and R. Alonso and T. Bárczy and D. Barrado Navascues and S. C. C. Barros and W. Baumjohann and T. Beck and P. Bendjoya and W. Benz and N. Billot and C. Broeg and M. -D. Busch and Sz. Csizmadia and P. E. Cubillos and M. B. Davies and M. Deleuil and A. Deline and L. Delrez and O. D. S. Demangeon and B. -O. Demory and A. Derekas and B. Edwards and D. Ehrenreich and A. Erikson and A. Fortier and L. Fossati and M. Fridlund and K. Gazeas and M. Gillon and M. Güdel and A. Heitzmann and Ch. Helling and S. Hoyer and K. G. Isaak and L. L. Kiss and J. Korth and K. W. F. Lam and J. Laskar and A. Lecavelier des Etangs and M. Lendl and D. Magrin and L. Marafatto and P. F. L. Maxted and M. Mecina and D. Mékarnia and C. Mordasini and D. Mura and G. Olofsson and R. Ottensamer and I. Pagano and E. Pallé and G. Peter and D. Pollacco and D. Queloz and R. Ragazzoni and N. Rando and F. Ratti and H. Rauer and I. Ribas and S. Salmon and N. C. Santos and G. Scandariato and D. Ségransan and A. E. Simon and A. M. S. Smith and S. G. Sousa and M. Stalport and O. Suarez and S. Sulis and Gy. M. Szabó and S. Udry and V. Van Grootel and J. Venturini and E. Villaver and N. A. Walton and D. Wolter},
journal= {arXiv preprint arXiv:2407.06097},
year = {2024}
}
Comments
22 pages, 10 figures, Accepted for publication by Astronomy and Astrophysics