AI 中文总结
研究双星中自旋-轨道不对准起源，通过研究恒星双星长期自旋动力学推导卡西尼状态，分离自旋-自旋共振，发现其能激发次级天体倾角，磁制动和潮汐耗散有不同作用，该耦合或可解释年轻恒星双星倾角多样性。
AI 中文摘要
在双星中越来越多地观测到自旋-轨道不对准，但其起源仍不确定。我们研究了恒星双星的长期自旋动力学并推导了相关的卡西尼状态。我们分离出一种当两个恒星自旋进动频率变得可公度时出现的自旋-自旋共振。这种共振能将次级天体的倾角激发到很高的值，即便主天体仅有微弱倾斜。磁制动有利于高倾角状态的形成，而潮汐耗散可能会抑制它们。自旋-自旋耦合可能有助于解释在年轻恒星双星中观测到的倾角多样性。
英文摘要
Spin-orbit misalignment is increasingly observed in binary stars, but its origin remains uncertain. We study the secular spin dynamics of stellar binaries and derive the associated Cassini states. We isolate a spin-spin resonance that arises when the two stellar spin-precession frequencies become commensurate. This resonance can excite the obliquity of the secondary to high values even when the primary is only weakly tilted. Magnetic braking favors the formation of high-obliquity states, whereas tidal dissipation may suppress them. Spin-spin coupling may thus help explain the observed diversity of obliquities in young stellar binaries.
Comments7 pages, 7 figures, 1 table
Journal refAstronomy and Astrophysics, vol. 711, L10 (2026)
DOI：10.1051/0004-6361/202660175
