TIC-65910228 b / NGTS-38 b，一颗轨道周期为180天的温暖超星云质行星
地球与行星天体物理
2026-02-19 v2
摘要
我们发现了 TIC-65910228 b / NGTS-38 b，这是一颗行星质量为 M，半径为 R 的巨型行星，轨道周期为 天，偏心率为 。该行星绕一颗亮度为 V= 星等，金属丰度为 [Fe/H]= dex 的 F6V-F7V 型亮金属主序星。该行星最初在 TESS 第 33 区单次轨道迹变中被发现。NGTS 进行了 228 夜的光度监测，检测到行星轨道迹变的尾部，联合 CORALIE 和 HARPS 的光谱径向速度监测确认其轨道周期约为 180.5 天。这些径向速度测量值也表明伴随物为行星质量。随后，TESS 跟随观测项目 coordinated 了额外的轨道迹变观测，进一步确认并细化了该周期。该行星的平衡温度为 K，加入已知的良好表征的温暖型巨型行星少数行列中。该目标位于即将到来的 PLATO 任务的 LOPS2 场，可进一步细化系统参数并潜在发现额外的伴随物。NGTS-38 b 的明亮主机星和宽阔轨道距离使其成为进一步研究的吸引目标，包括潜在测量其自转轨道对齐或针对潜在的外星卫星/环的定向搜寻。
引用
@article{arxiv.2602.12977,
title = {TIC-65910228 b / NGTS-38 b, a 180 day transiting warm super-Jupiter},
author = {Toby Rodel and Solène Ulmer-Moll and Samuel Gill and Christopher. A. Watson and Yoshi Nike Emilia Eschen and Alix V. Freckelton and Annelies Mortier and Karen A. Collins and Diana Dragomir and Zahra Essack and Brett Skinner and Niamh Mallaghan and Peter J. Wheatley and David R. Anderson and Ioannis Apergis and Khalid Barkaoui and Matthew P. Battley and Daniel Bayliss and François Bouchy and Edward M. Bryant and Matthew R. Burleigh and Benjamin M. J. Cadell and Samuel J. Carlier and Yann Carteret and Sarah L. Casewell and Alastair B. Claringbold and Jean C. Costes and Benjamin D. R. Davies and Lauren Doyle and Phil Evans and Jorge Fernández Fernández and Emile Fontanet and Edward Gillen and Michael R. Goad and George Harvey and Faith Hawthorn and Katlyn L. Hobbs and Melissa Hobson and Giovanni Isopi and James S. Jenkins and Alicia Kendall and David Kipping and Monika Lendl and Franco Mallia and Christopher Mann and James McCormac and Ernst J. W. de Mooij and Maximiliano Moyano and Arianna Nigioni and Mohammad Odeh and Vera Maria Passegger and Suman Saha and Richard P. Schwarz and Amber Sedgley and Avi Shporer and Abderahmane Soubkiou and Stéphane Udry and Dimitri Veras and Jean. P. Vignes and Steven Villanueva and José I. Vinés and Richard West and Thomas G. Wilson and Hannah L. Worters and Mitchell E. Young and Aldo Zapparata},
journal= {arXiv preprint arXiv:2602.12977},
year = {2026}
}
备注
23 pages, 13 figures, 8 tables. Submitted to Monthly Notices of the Royal Astronomical Society. Coordinated simultaneous submission with independent paper by Rojas et al