绕 0.2 太阳质量星体的轨道上行的巨型行星
地球与行星天体物理
2025-06-11 v2 太阳与恒星天体物理
摘要
行星形成模型表明，围绕低质量恒星形成巨型行星的难度显著增加，这与原始星盘质量随恒星质量的比例关系有关。因此，发现围绕此类低质量恒星的巨型行星，对巨型行星形成过程提出了强烈的制约。本文报道了发现的一颗绕 星体轨道上行的行星。该行星 TOI-6894 b 具有质量和半径为 和 ，且可能包含 的金属成分。TOI-6894 b 的发现凸显了需要更好地理解巨型行星形成机制以及其发生的原始星盘环境的重要性。极深的 transit（17% 深度）使 TOI-6894 b 成为可被观测大气特征化的最可及的系外行星巨型之一，这将是完全解释该非凡系统形成历史以及大气甲烷化学研究的关键。
引用
@article{arxiv.2506.07931,
title = {A transiting giant planet in orbit around a 0.2-solar-mass host star},
author = {Edward M. Bryant and Andrés Jordán and Joel D. Hartman and Daniel Bayliss and Elyar Sedaghati and Khalid Barkaoui and Jamila Chouqar and Francisco J. Pozuelos and Daniel P. Thorngren and Mathilde Timmermans and Jose Manuel Almenara and Igor V. Chilingarian and Karen A. Collins and Tianjun Gan and Steve B. Howell and Norio Narita and Enric Palle and Benjamin V. Rackham and Amaury H. M. J. Triaud and Gaspar Á. Bakos and Rafael Brahm and Melissa J. Hobson and Vincent Van Eylen and Pedro J. Amado and Luc Arnold and Xavier Bonfils and Artem Burdanov and Charles Cadieux and Douglas A. Caldwell and Victor Casanova and David Charbonneau and Catherine A. Clark and Kevin I. Collins and Tansu Daylan and Georgina Dransfield and Brice-Oliver Demory and Elsa Ducrot and Gareb Fernández-Rodríguez and Izuru Fukuda and Akihiko Fukui and Michaël Gillon and Rebecca Gore and Matthew J. Hooton and Kai Ikuta and Emmanuel Jehin and Jon M. Jenkins and Alan M. Levine and Colin Littlefield and Felipe Murgas and Kendra Nguyen and Hannu Parviainen and Didier Queloz and S. Seager and Daniel Sebastian and Gregor Srdoc and R. Vanderspek and Joshua N. Winn and Julien de Wit and Sebastián Zúñiga-Fernández},
journal= {arXiv preprint arXiv:2506.07931},
year = {2025}
}
备注
Published in Nature Astronomy (https://www.nature.com/articles/s41550-025-02552-4)