CHEOPS 捕获的 55 Cancri e 掩食
地球与行星天体物理
2023-01-11 v1
摘要
过去在可见光与红外波长上对超短周期超级地球 55 Cnc e 的掩食与相位曲线观测，一直难以用行星反射与辐射模型调和。本研究中，我们分析了一组在两年跨度内由 CHEOPS 卫星获取的 41 次掩食。我们报告探测到 55 Cnc e 的掩食，平均深度为 ppm。在扣除 Spitzer 于 4.5m 测得的热辐射污染后，我们推导出几何反照率的 2- 上限为 。CHEOPS 的光度性能首次实现了该超级地球在可见光中单次掩食的探测，并识别出很可能由恒星米粒组织引起的短时标光度波纹。我们还发现随时间变化的掩食深度中存在清晰的 47.3 天正弦模式，我们无法将其归于恒星噪声或仪器系统误差，但其行星起源可通过即将开展的 JWST 对该标志性超级地球的掩食观测进行检验。
引用
@article{arxiv.2211.03582,
title = {55 Cancri e's occultation captured with CHEOPS},
author = {B. -O. Demory and S. Sulis and E. Meier Valdes and L. Delrez and A. Brandeker and N. Billot and A. Fortier and S. Hoyer and S. G. Sousa and K. Heng and M. Lendl and A. Krenn and B. M. Morris and J. A. Patel and Y. Alibert and R. Alonso and G. Anglada and T. Barczy and D. Barrado and S. C. C. Barros and W. Baumjohann and M. Beck and T. Beck and W. Benz and X. Bonfils and C. Broeg and M. Buder and J. Cabrera and S. Charnoz and A. Collier Cameron and H. Cottard and Sz. Csizmadia and M. B. Davies and M. Deleuil and O. D. S. Demangeon and D. Ehrenreich and A. Erikson and L. Fossati and M. Fridlund and D. Gandolfi and M. Gillon and M. Gudel and K. G. Isaak and L. L. Kiss and J. Laskar and A. Lecavelier des Etangs and C. Lovis and A. Luntzer and D. Magrin and L. Marafatto and P. F. L. Maxted and V. Nascimbeni and G. Olofsson and R. Ottensamer and I. Pagano and E. Palle and G. Peter and G. Piotto and D. Pollacco and D. Queloz and R. Ragazzoni and N. Rando and F. Ratti and H. Rauer and I. Ribas and N. C. Santos and G. Scandariato and D. Segransan and A. E. Simon and A. M. S. Smith and M. Steller and Gy. M. Szabo and N. Thomas and S. Udry and V. Van Grootel and N. A. Walton},
journal= {arXiv preprint arXiv:2211.03582},
year = {2023}
}
备注
In press. Accepted for publication in Astronomy and Astrophysics on 13 October 2022. 10 pages, 7 figures and 3 tables