TOI 762 A b 与 TIC 46432937 b：两种潮伏M星的巨型行星
地球与行星天体物理
2024-07-11 v1
摘要
我们报告发现TOI 762 A b和TIC 46432937 b，两种潮伏M星的巨型行星。两套系统的潮伏首次由NASA TESS任务观测发现，经过使用VLT/ESPRESSO进行高精度径向速度(RV)观测确认为行星。TOI 762 A b为一颗温暖亚行星，质量为0.251±0.042 M_J，半径为0.744±0.017 R_J，轨道周期为3.4717天。它潮伏的一颗中M星，质量为0.442±0.025 M_S，半径为0.4250±0.0091 R_S。星体TOI 762 A拥有与TOI 762 A相隔3.2"(~319 AU)的分辨双星伴星TOI 762 B，估计质量为0.227±0.010 M_S。行星TIC 46432937 b为一颗温暖超行星，质量为3.20±0.11 M_J，半径为1.188±0.030 R_J。行星轨道周期为P=1.4404天，进行早期M星的吃住式潮伏，其宿主星质量为0.563±0.029 M_S，半径为0.5299±0.0091 R_S。TIC 46432937 b是目前发现的转绕M星的最高质量行星之一。TIC 46432937 b也是大气观测的热门目标，具有已知任何温暖超行星(质量大于3.0 M_J，平衡温度低于1000 K)的最高传输光谱学指数或发射光谱学指数值。
引用
@article{arxiv.2407.07187,
title = {TOI 762 A b and TIC 46432937 b: Two Giant Planets Transiting M Dwarf Stars},
author = {Joel D. Hartman and Daniel Bayliss and Rafael Brahm and Edward M. Bryant and Andrés Jordán and Gáspár Á. Bakos and Melissa J. Hobson and Elyar Sedaghati and Xavier Bonfils and Marion Cointepas and Jose Manuel Almenara and Khalid Barkaoui and Mathilde Timmermans and George Dransfield and Elsa Ducrot and Sebastián Zúñiga-Fernández and Matthew J. Hooton and Peter Pihlmann Pedersen and Francisco J. Pozuelos and Amaury H. M. J. Triaud and Michaël Gillon and Emmanuel Jehin and William C. Waalkes and Zachory K. Berta-Thompson and Steve B. Howell and Elise Furlan and George R. Ricker and Roland Vanderspek and Sara Seager and Joshua N. Winn and Jon M. Jenkins and David Rapetti and Karen A. Collins and David Charbonneau and Christopher J. Burke and David R. Rodriguez},
journal= {arXiv preprint arXiv:2407.07187},
year = {2024}
}
备注
29 pages, 7 figures, 8 tables, accepted for publication in AAS Journals