CHEOPS 观测的 HIP 41378：planet d 在哪里？
地球与行星天体物理
2024-06-26 v1
摘要
HIP 41378 d 为一颗长期行星，仅观测到相隔三年才进行了两次视网膜现象。根据稳定性考虑以及对 Rossiter-McLaughlin 效应的部分检测，已确定 P_d = 278.36 d 为最可能的轨道周期。我们针对 P_d = 278.36 d 预测的视网膜时机，对 HIP 41378 d 进行 CHEOPS 观测，但观测结果显示未见视网膜。我们发现，大型（>22.4 小时）视网膜时机变动（TTVs）可解释 CHEOPS 观测窗口内的未检测。我们还考察了轨道解错误的可能性，这对该系统的了解具有重大影响。如果 P_d ≠ 278.36 d，能够最小化偏心率的轨道周期为 101.22 d 和 371.14 d。最短的轨道周期将由 TESS 在 2025 年 1 月开始的第 88 区观测测试。我们的研究表明，像 CHEOPS 这样的任务的重要性，因为它是唯一能够进行长时间观测（即从太空）来追踪可能受大 TTVs 影响的长期行星时机的任务。
引用
@article{arxiv.2405.20077,
title = {HIP 41378 observed by CHEOPS: Where is planet d?},
author = {S. Sulis and L. Borsato and S. Grouffal and H. P. Osborn and A. Santerne and A. Brandeker and M. N. Günther and A. Heitzmann and M. Lendl and M. Fridlund and D. Gandolfi and Y. Alibert and R. Alonso and T. Bárczy and D. Barrado Navascues and S. C. Barros and W. Baumjohann and T. Beck and W. Benz and M. Bergomi and N. Billot and A. Bonfanti and C. Broeg and A. Collier Cameron and C. Corral van Damme and A. C. M. Correia 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 K. Gazeas and M. Gillon and M. Güdel and Ch. Helling and S. Hoyer and K. G. Isaak and L. Kiss and J. Korth and K. W. F. Lam and J. Laskar and A. Lecavelier des Etangs and D. Magrin and P. F. L. Maxted and C. Mordasini and V. Nascimbeni and G. Olofsson and R. Ottensamer and I. Pagano and E. Pallé and G. Peter and D. Piazza and G. Piotto and D. Pollacco and D. Queloz and R. Ragazzoni and N. Rando and H. Rauer and I. Ribas 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 M. Steinberger and M. Gy. Szabó and A. Tuson and S. Udry and S. Ulmer-Moll and V. Van Grootel and J. Venturini and E. Villaver and N. A. Walton and T. G. Wilson and D. Wolter and T. Zingales},
journal= {arXiv preprint arXiv:2405.20077},
year = {2024}
}
备注
Accepted for publication in Astronomy and Astrophysics