一颗处于潮汐撕裂边缘的地球大小行星
地球与行星天体物理
2024-08-01 v1 太阳与恒星天体物理
摘要
TOI-6255~b (GJ 4256) 是一颗行星质地为地球大小（ ），轨道周期仅为 5.7 小时。通过新配备的 Keck Planet Finder (KPF) 和 CARMENES 光谱仪，我们确定了该行星的质量为 0.14 。该行星位于洛oche 极限之外， = 1.13 。强潮汐力可能使行星形变为三轴椭球体，其长轴约为短轴的 10%。假设星体潮汐质量因子 ，我们预测潮汐轨道衰减将使 TOI-6255 在约 400 百万年后到达洛oche 极限。此类潮汐撕裂可能产生行星吞噬痕迹，即星体在与其共生星星相比拥有异常高的熔融元素丰度。TOI-6255 b 也是搜索星体-行星磁相互作用的理想目标，这种相互作用可能导致内部熔融并加速轨道衰减。TOI-6255 b 是面向 James Webb Space Telescope 相位曲观测的热门目标（Emission Spectroscopy Metric 约为 24）。
引用
@article{arxiv.2407.21167,
title = {An Earth-sized Planet on the Verge of Tidal Disruption},
author = {Fei Dai and Andrew W. Howard and Samuel Halverson and Jaume Orell-Miquel and Enric Palle and Howard Isaacson and Benjamin Fulton and Ellen M. Price and Mykhaylo Plotnykov and Leslie A. Rogers and Diana Valencia and Kimberly Paragas and Michael Greklek-McKeon and Jonathan Gomez Barrientos and Heather A. Knutson and Erik A. Petigura and Lauren M. Weiss and Rena Lee and Casey L. Brinkman and Daniel Huber and Gudmundur Steffansson and Kento Masuda and Steven Giacalone and Cicero X. Lu and Edwin S. Kite and Renyu Hu and Eric Gaidos and Michael Zhang and Ryan A. Rubenzahl and Joshua N. Winn and Te Han and Corey Beard and Rae Holcomb and Aaron Householder and Gregory J. Gilbert and Jack Lubin and J. M. Joel Ong and Alex S. Polanski and Nicholas Saunders and Judah Van Zandt and Samuel W. Yee and Jingwen Zhang and Jon Zink and Bradford Holden and Ashley Baker and Max Brodheim and Ian J. M. Crossfield and William Deich and Jerry Edelstein and Steven R. Gibson and Grant M. Hill and Sharon R Jelinsky and Marc Kassis and Russ R. Laher and Kyle Lanclos and Scott Lilley and Joel N. Payne and Kodi Rider and Paul Robertson and Arpita Roy and Christian Schwab and Abby P. Shaum and Martin M. Sirk and Chris Smith and Adam Vandenberg and Josh Walawender and Sharon X. Wang and Shin-Ywan and Wang and Edward Wishnow and Jason T. Wright and Sherry Yeh and Jos. A. Caballero and Juan C. Morales and Felipe Murgas and Evangelos Nagel and Ansgar Reiners and Andreas Schweitzer and Hugo M. Tabernero and Mathias Zechmeister and Alton Spencer and David R. Ciardi and Catherine A. Clark and Michael B. Lund and Douglas A. Caldwell and Karen A. Collins and Richard P. Schwarz and Khalid Barkaoui and Cristilyn N. Watkins and Avi Shporer and Norio Narita and Akihiko Fukui and Gregor Srdoc and David W. Latham and Jon M. Jenkins and George R. Ricker and Sara Seager and Roland Vanderspek},
journal= {arXiv preprint arXiv:2407.21167},
year = {2024}
}
备注
18 pages, 7 figures, 5 tables, accepted to AAS Journals. The first RV mass measurement from the Keck Planet Finder