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Constraining small planet compositions for future missions

delete2026-05-01
delete0
PRE
AI
L
Larissa Palethorpe *
A
Annelies Mortier
E
Egger, Jo Ann
K
Ken Rice
T
T. G. Wilson
A
Andrew Vanderburg
B
Bonomo, Aldo S.
W
W. Boschin
A
A. Collier Cameron
Y
Yoshi Nike Emilia Eschen
H
Harutyunyan, Avet
L
L. Malavolta
F
Fiorenzano, Aldo F. Martinez
A
A. Sozzetti
S
Stalport, Manu
V
Vincent Van Eylen
W
Watson, Christopher Allan
DOI：10.1093/mnras/stag520delete
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摘要

摘要

En 中文
对小型凌日系外行星进行精确的质量和半径测量对于探究其成分、形成历史和潜在宜居性至关重要。我们针对六个行星系统（每个系统至少包含一颗小型凌日行星）进行了统一分析：K2-79、K2-106、K2-111、K2-222、K2-263和TOI-1634。本研究结合了CHEOPS凌日观测数据与K2、TESS及地面设施的历史光度数据，以及来自HARPS-N、HIRES、ESPRESSO等设备的新数据和历史径向速度数据。针对每个系统，我们进行了联合凌日和径向速度建模，实现了质量精度优于15%、半径精度优于5%的典型精度，从而能够精确确定其平均密度。这些结果揭示了多种成分类型，包括位于半径谷附近的岩石行星（如K2-106 b、TOI-1634 b）、需要富蒸汽或混合挥发性包层的中间密度行星（如K2-111 b、K2-263 b），以及与气态矮星或水世界一致的低密度行星（如K2-79 b、K2-222 b）。多个系统显示径向速度数据中存在额外伴星证据，但在凌日观测中未被发现。研究结果突显了协同CHEOPS和HARPS-N观测在获取小型行星最精确平均密度方面的价值，并为未来大气特征化任务的前期准备提供了支持。
Keyword:
techniques: photometric
techniques: spectroscopic
exoplanets
planets and satellites: composition

期刊

Monthly Notices of the Royal Astronomical Society 封面图
Monthly Notices of the Royal Astronomical Society
IF:
4.8
论文数:
7.1W
被引数:
25.0W

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