利用 CHEOPS 任务计时能力观测温木星行星
地球与行星天体物理
2021-06-23 v1
摘要
我们呈现了用 CHaracterising ExOPlanet Satellite（CHEOPS）观测的七颗已知温木星（warm-Jupiter）的 17 条凌星光变曲线。这些光变曲线收集自 CHEOPS 保证时间观测（GTO）计划，该计划搜寻由可能的外部扰动天体引起的温木星凌星时刻变化（TTV），以阐明此类行星系统的演化路径。我们描述了从规划到数据分析的 CHEOPS 观测过程。本工作中我们聚焦于 CHEOPS 的计时性能、凌星相位采样的影响，以及将多次凌星合并所能获得的改进。对于样本中亮度最高的目标（WASP-38，G = 9.2），我们达到了约 13–16 秒的最高凌星时刻精度。通过对 G >= 11 的较暗目标多次凌星合并分析，我们获得了约 2 分钟的计时精度。利用 CHEOPS 的额外观测覆盖更长的时间基线，将进一步改善凌星时刻精度，并使我们能够探测由外部扰动天体引起的可能 TTV 信号。
引用
@article{arxiv.2106.11331,
title = {Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets},
author = {Borsato L and Piotto G and Gandolfi D and Nascimbeni V and Lacedelli G and Marzari F and Billot N and Maxted P and Sousa S G and Cameron A C and Bonfanti A and Wilson T and Serrano L and Garai Z and Alibert Y and Alonso R and Asquier J and Bárczy T and Bandy T and Barrado D and Barros S C and Baumjohann W and Beck M and Beck T and Benz W and Bonfils X and Brandeker A and Broeg C and Cabrera J and Charnoz S and Csizmadia S and Davies M and Deleuil M and Delrez L and Demangeon O D and Demory B and Lecavelier des Etangs A and Ehrenreich D and Erikson A and Escudé G and Fortier A and Fossati L and Fridlund M and Gillon M and Guedel M and Hasiba J and Heng K and Hoyer S and Isaak K G and Kiss L L and Kopp E and Laskar J and Lendl M and Lovis C and Magrin D and Munari M and Ottensamer R and Peter G and Ragazzoni R and Rando N and Simon A E and Steller M and Olofsson G and Pagano I and Palle E and Pollacco D and Queloz D and Rauer H and Ribas I and Segransan D and Santos N M and Scandariato G and Smith A and Szabo G M and Thomas N and Udry S and Van Grootel and Walton N A},
journal= {arXiv preprint arXiv:2106.11331},
year = {2021}
}
备注
23 pages, 19 figures, 8 tables. Accepted for publication in MNRAS