2046310

Target RA (J2000): 189.839218 and deg Target Dec (J2000): 20.02734 and deg Gaia GMag: 8.172 Programme ID: CH_PR120053 Programme Manager: LELEU PI of observing programme: Benz Title of programme: MR.IMPROVE - System Architecture Abstract: The resonant/near-resonant state of multi-planetary systems contains clues to their formation and subsequent evolution through disc migration and tidal dissipation. Physical quantities such as densities eccentricities distance to 2-body or 3-body resonances and the amplitude of libration of resonant angles subtly encode the systems' history. These quantities can be estimated by observing transit timing variations in the system. The program aims to use CHEOPS high-precision photometry and versatility coupled with orbital dynamics modelling to : 1- constrain the resonant state of systems 2- Look for (density-period) correlations inside known multi-planetary systems and (help to) determine their mass-radius-period relationship and 3 - Look for additional planets in these compact multi-planetary systems to improve our knowledge of their architecture. [truncated! Please see actual data for full text]

目标赤经（J2000坐标系）：189.839218 度；目标赤纬（J2000坐标系）：20.02734 度；盖亚（Gaia）G星等：8.172；项目编号：CH_PR120053；项目主管：LELEU；观测项目首席研究员（Principal Investigator，PI）：Benz；项目名称：MR.IMPROVE——系统架构

多行星系统的共振/近共振状态蕴含了其通过星盘迁移与潮汐耗散形成并后续演化的关键线索。诸如密度、偏心率、与二体或三体共振的间距，以及共振角天平动的振幅等物理量，均微妙地编码了该系统的演化历史。通过观测系统的凌星计时变化（transit timing variations），可估算得到上述物理量。本项目旨在结合高精度测光与多功能特性的系外行星特征卫星（CHEOPS）观测数据，辅以轨道动力学建模，实现三大科学目标：1. 约束系统的共振状态；2. 探寻已知多行星系统内的（密度-周期）相关性，助力确定其质量-半径-周期关系；3. 搜寻这类紧致多行星系统中的额外行星，以深化对其系统架构的认知。

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