三颗新发现及一颗已知 Neptune 级行星的精确质量与半径测定
地球与行星天体物理
2025-11-26 v1
摘要
作为KESPRINT合作项目的一部分，我们报告了发现和表征了三颗亚 Neptune 到超 Neptune 级的系外行星，这些行星跨越了系外 Neptune 区域的关键区域。TOI-1472c和TOI-1648b是新发现的亚 Neptune 级行星，而TOI-1472b是一颗已知的超 Neptune 级行星，我们提供了改进的质量测量。这些行星的轨道周期为6--15天，半径为2.5--4.1 R，探索了行星形成和大气演化仍不充分理解的区域。我们将 TESS 信态光度与地面径向速度测量相结合，以确定精确的质量、半径和轨道属性。TOI-1472b的质量为 M，半径为 R；TOI-1472c的质量为 M，半径为 R；TOI-1648b的质量为 M，半径为 R。这些行星表现出不同程度的离心率（0.041--0.178），表明其演化历史各不相同。TOI-1648b由于其高传输光度学指数(TSM约59)，是大气表征的理想目标。这些三颗行星为小至中型系外行星的结构、成分及动力学演化提供了精确约束，丰富了我们对系外 Neptune 区域的理解。
引用
@article{arxiv.2511.20119,
title = {Precise mass and radius determination for two new and one known Neptune-sized planets around G Dwarf hosts},
author = {Ilaria Carleo and Grzegorz Nowak and Felipe Murgas and Enric Pallé and Gaia Lacedelli and Thomas Masseron and Emily W. Wong and Amadeo Castro-González and Dawid Jankowski and Patrick Eggenberger and James S. Jenkins and Krzysztof Goździewski and Vincent Bourrier and Douglas R. Alves and José I. Vines and Keivan G. Stassun and Matteo Brogi and Sergio Messina and Catherine A. Clark and Karen A. Collins and Hans J. Deeg and Elise Furlan and Davide Gandolfi and Samuel Geraldía González and Coel Hellier and Artie P. Hatzes and Steve B. Howell and Judith Korth and Emil Knudstrup and Jorge Lillo-Box and John H. Livingston and Jaume Orell-Miquel and Carina Persson and Seth Redfield and Boris Safonov and David Baker and Rafael Delfin Barrena Delgado and Allyson Bieryla and Andrew Boyle and Pau Bosch-Cabot and Núria Casasayas Barris and Stavros Chairetas and David R. Ciardi and Akihiko Fukui and Pere Guerra and Kiyoe Kawauchi and Florence Libotte and Michael B. Lund and Rafael Luque and Eduardo Lorenzo Martín Guerrero de Escalante and Bob Massey and Edward J. Michaels and Giuseppe Morello and Norio Narita and Hannu Parvianien and Richard P. Schwarz and Avi Shporer and Monika Stangret and Cristilyn N. Watkins},
journal= {arXiv preprint arXiv:2511.20119},
year = {2025}
}