CHEOPS观测确认WASP-33系统中的节点预转
地球与行星天体物理
2025-01-23 v1 太阳与恒星天体物理
摘要
目的: 本研究旨观测WASP-33b的轨道道集和遮掩现象，该系统中伴随快速旋转的δ型Scuti脉冲星，借此通过重力暗化效应测量轨道偏斜角，并通过遮掩深度约束几何光度。方法: 我们使用CHEOPS观测到四次轨道穿越和四次遮掩，并采用多种技术消除光曲线中脉冲星效应以及常规CHEOPS系统效应。我们还对低分辨率光谱数据和Gaia数据进行全面分析，以重新确定WASP-33的星际属性。结果: 我们测得轨道偏斜角为111.3+0.2-0.7度，与通过多普勒测绘法获得的先前测量结果一致。我们也测量了行星影响参数，并确认该参数正因行星轨道的节点预转而发生快速的世界面演。这种预转使我们能够确定该星的第二阶流体爱 numbers，结果与理论星模型的预测结果良好一致。我们无法可靠地测量唯一的遮掩深度，强调长期基准观测以更好地测量脉冲周期的必要性。
引用
@article{arxiv.2412.08557,
title = {CHEOPS observations confirm nodal precession in the WASP-33 system},
author = {A. M. S. Smith and Sz. Csizmadia and V. Van Grootel and M. Lendl and C. M. Persson and G. Olofsson and D. Ehrenreich and M. N. Günther and A. Heitzmann and S. C. C. Barros and A. Bonfanti and A. Brandeker and J. Cabrera and O. D. S. Demangeon and L. Fossati and J. -V. Harre and M. J. Hooton and S. Hoyer and Sz. Kalman and S. Salmon and S. G. Sousa and Gy. M. Szabó and T. G. Wilson and Y. Alibert and R. Alonso and J. Asquier and T. Bárczy and D. Barrado and W. Baumjohann and W. Benz and N. Billot and L. Borsato and C. Broeg and A. Collier Cameron and A. C. M. Correia and P. E. Cubillos and M. B. Davies and M. Deleuil and A. Deline and B. -O. Demory and A. Derekas and B. Edwards and J. A. Egger and A. Erikson and A. Fortier and M. Fridlund and D. Gandolfi and K. Gazeas and M. Gillon and M. Güdel and J. Hasiba and Ch. Helling 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 D. Magrin and P. F. L. Maxted and B. Merín and C. Mordasini and V. Nascimbeni 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 M. Stalport and S. Sulis and S. Udry and S. Ulmer-Moll and J. Venturini and E. Villaver and V. Viotto and I. Walter and N. A. Walton and S. Wolf},
journal= {arXiv preprint arXiv:2412.08557},
year = {2025}
}
备注
18 pages, 12 figures. Accepted for publication in Astronomy & Astrophysics