AI 中文总结
本文总结 Cool Stars 23 专题分会的讨论，聚焦 granulation 与磁活动对 RV 精度的影响，提出需结合物理模型与数据方法等，以实现下一代 RV 行星搜寻所需的亚 40 cm/s 精度。
AI 中文摘要
恒星变异性已成为实现探测和表征类地系外行星所需径向速度（RV）精度的主要限制因素。尽管在减轻振荡和磁活动影响方面已取得重大进展，但对流 granulation 及其与恒星星场的相互作用仍是 RV 变异性最不被理解的来源之一。为应对这些挑战，我们在 Cool Stars 23 上组织了专题分会“将径向速度中的 granulation 与磁活动关联：高精度光谱学的下一个突破”。该分会汇聚了从事观测、数值模拟和数据驱动技术研究的科研人员，讨论 granulation 驱动的 RV 信号的当前认知，并确定未来进展的最有前景方向。通过特邀报告、投稿报告及后续的社区讨论，与会者强调了将基于物理的模型与数据驱动方法相结合、开发标准化基准数据集、针对不同恒星类型用高质量观测验证模拟的重要性。讨论还强调了需要协调观测策略、改进单个谱线的表征、开展基于物理的逐线分析以区分对流与磁信号。本文总结了分会期间产生的科学讨论和社区观点，并概述了达到下一代 RV 行星搜寻所需的亚 40 cm/s 精度必须解决的关键挑战。
英文摘要
Stellar variability has become the dominant limitation to achieving the radial velocity (RV) precision required for the detection and characterization of Earth-like exoplanets. While significant progress has been made in mitigating the effects of oscillations and magnetic activity, convective granulation and its interaction with stellar magnetic fields remain among the least understood sources of RV variability. To address these challenges, we organized the splinter session `Connecting Granulation and Magnetic Activity in Radial Velocities: The Next Breakthrough for High-Precision Spectroscopy' at Cool Stars 23. The session brought together researchers working on observations, numerical simulations, and data-driven techniques to discuss the current understanding of granulation-driven RV signals and identify the most promising directions for future progress. Through invited and contributed talks, followed by community discussions, participants emphasized the importance of combining physically motivated models with data-driven approaches, developing standardized benchmark datasets, and validating simulations against high-quality observations across a range of stellar types. The discussions also highlighted the need for coordinated observing strategies, improved characterization of individual spectral lines, and physically informed line-by-line analyses to disentangle convective and magnetic signals. This contribution summarises the scientific discussions and community perspectives that emerged during the session and outlines the key challenges that must be addressed to reach the sub-40 cm/s precision required for the next generation of RV planet searches.
CommentsNo figures
Journal refThe 23rd Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (Tokyo, June 15-19, 2026)
