AI 中文总结
本文概述了过去20年借助星震学、高精度分光偏振测量等技术获得的观测结果，揭示演化恒星自转与磁场性质超出理论预测，为理解低至中等质量恒星从亚巨星到白矮星阶段的演化提供了新洞察。
AI 中文摘要
自转与磁性是理解恒星时需考虑的重要现象，它们通过塑造恒星内部结构与化学混合过程，能显著改变恒星的基本性质和可观测属性。尽管如此，我们对自转与磁性在整个恒星生命周期中如何演化的理论认知仍不完整。对于演化恒星，其自转速率慢、磁场弱，导致观测研究难度极大，这使得我们的认知缺口尤为明显。针对这一问题，过去20年间，探测磁性与自转的仪器取得了长足进步。借助这些新工具，我们发现演化恒星的自转方式超出了现有理论预测，且磁场性质也与预期不符。本文将简要概述近期部分观测结果及其对恒星认知的启示，重点聚焦于星震学和高精度分光偏振测量领域的进展——这些技术在过去几十年中已取得显著发展。遵循“冷星”主题，本文将探讨低至中等质量恒星及其从亚巨星到白矮星阶段的演化过程。
英文摘要
Rotation and magnetism are important phenomena to consider when trying to understand stars. By shaping the structure and chemical mixing in the interior of stars, they can induce significant changes in both their fundamental and observable properties. Despite this, our theoretical picture of how rotation and magnetism evolve throughout the stellar lifecycle remains incomplete. Gaps in our understanding are particularly stark for evolved stars, where slow rotation rates and weak magnetic fields make observational studies difficult. In response to this issue, the last 20 years have seen instrumentation to probe magnetism and rotation progressing in leaps and bounds. Through these new tools we have found that evolved stars rotate in ways that we cannot predict and have magnetic fields with properties that we did not expect. In the following, I will provide a brief overview of some recent observational results and their implications for our understanding of stars. I will focus on advances in asteroseismology and high-precision spectropolarimetry, as these techniques have advanced significantly over the last few decades. In keeping with the theme of Cool Stars, I'll cover stars with low to intermediate masses and their evolution from the subgiant to the white dwarf phase.
CommentsConference proceedings for the 23rd Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (Cool Stars 23), 10 pages, 13 figures
