ASTEP高五：三颗验证型行星与两颗双星星体于广泛的长期候选天体中
摘要
我们报告了对五个长期TESS感兴趣对象（TOIs）的分析，这些对象均围绕类似太阳的恒星，轨道周期超过一个月。最初由光盘转移星座（TESS）识别，我们利用南极搜索转体行星（ASTEP）进行了广泛的监测，并得到TESS跟随观测计划（TFOP）网络中其他设施的支持。这些目标位于周期-半径参数空间中较为未探索的区域，为行星形成与迁移提供了宝贵的原始探针，因为温暖行星能够更好地保持其演化纹迹。为characterize这些系统，我们利用高分辨率星粒成像搜索附近恒星伴侣，并通过勘测光谱和光谱能分布（SED）拟合来细化恒星参数。我们将TESS光度与ASTEP的高精度地面观测相结合，并在可用的情况下包含其他光度和径向速度数据。我们应用统计验证来评估每个候选对象的行星本质，并使用Allesfitter联合模型化 photometric 和光谱数据集。我们验证了三个TOI的行星本质，包括两个温暖的Saturns TOI-4507b（8.2地球半径，104天）和TOI-3457b（10.0地球半径，32.6天），以及温暖的亚太空B TOI-707b（2.4地球半径，52.8天）。其余两个候选对象最符合双星星体的特征，即TOI-2404和TOI-4404。这些结果有助于丰富温暖行星的稀疏区域，这些行星作为行星演化的关键探针，并展示了ASTEP作为长期系统地面跟随仪器的有效性。
引用
@article{arxiv.2510.01725,
title = {High five from ASTEP: Three validated planets and two eclipsing binaries in a diverse set of long-period candidates},
author = {Erika Rea and Maximilian N. Günther and George Dransfield and Tristan Guillot and Amaury H. M. J. Triaud and Keivan G. Stassun and Juan I. Espinoza-Retamal and Rafael Brahm and Solène Ulmer-Moll and Matteo Beltrame and Vincent Deloupy and Mathilde Timmermans and Lyu Abe and Karim Agabi and Philippe Bendjoya and Djamel Mekarnia and Francois-Xavier Schmider and Olga Suarez and Ana M. Heras and Theresa Lüftinger and Bruno Merín and François Bouchy and Thomas Henning and Andrés Jordán and Monika Lendl and Marcelo Tala-Pinto and Trifon Trifonov and Khalid Barkaoui and Luke G. Bouma and Gavin Boyle and César Briceño and Amadeo Castro-González and Alastair Claringbold and Karen A. Collins and Keith Horne and Steve B. Howell and Andrew W. Mann and Felipe Murgas and Enric Palle and Samuel Quinn and Joseph E. Rodriguez and Richard P. Schwarz and T. G. Tan and George Zhou and Carl Ziegler and Sara Seager and Joshua N. Winn},
journal= {arXiv preprint arXiv:2510.01725},
year = {2026}
}
备注
Accepted for publication in A&A. Please note that this submission is coordinated with a complementary paper by Espinoza-Retamal et al., which focuses in detail on one of the targets (TOI-4507) with additional radial velocity and Rossiter-McLaughlin analysis