TESS 与 NGTS 发现一颗长周期（P = 61.8 天）M5V 矮星凌食类太阳恒星
太阳与恒星天体物理
2020-05-20 v2 地球与行星天体物理
摘要
凌星系外行星巡天卫星（TESS）产生了大量单凌星事件候选体，正由下一代凌星巡天（NGTS）进行监测。我们用 NGTS 观测了 TIC-231005575 系统（Tmag = 12.06，Teff = 5500 ± 85 K）的第二个历元，并用南非的拉斯坎布雷斯天文台（LCO）望远镜观测了第三个历元，以约束其轨道周期（P = 61.777 d）。随后用 CORALIE 进行的视向速度测量显示，凌食天体质量为 M2 = 0.128 ± 0.003 M，表明该系统是一个 G-M 双星。次星半径为 R2 = 0.154 ± 0.008 R，与恒星演化模型的一致性优于 1-。
引用
@article{arxiv.2002.09311,
title = {A long period (P = 61.8-d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS},
author = {Samuel Gill and Benjamin F. Cooke and Daniel Bayliss and Louise D. Nielson and Monika Lendl and Peter J. Wheatley and David R. Anderson and Maximiliano Moyano and Edward M. Bryant and Jack S. Acton and Claudia Belardi and Francois Bouchy and Matthew R. Burleigh and Sarah L. Casewell and Alexander Chausev and Michael R. Goad and James A. G. Jackman and James S. Jenkins and James McCormac and Maximilian N. Gunther and Hugh P. Osborn and Don Pollaco and Liam Raynard and Alexis M. S. Smith and Rosanna H. Tillbrook and Oliver Turner and Stephane Udry and Jose I. Vines and Christopher A. Watson and Richard G. West},
journal= {arXiv preprint arXiv:2002.09311},
year = {2020}
}
备注
8 pages, 5 figures, 3 tables. Accepted for publication in MNRAS