Sheikh Mohammed A, Weaver Richard L, Dahmen Karin A
Department of Physics, 1110 West Green Street, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, USA.
Phys Rev Lett. 2016 Dec 23;117(26):261101. doi: 10.1103/PhysRevLett.117.261101. Epub 2016 Dec 19.
The star KIC8462852 (Tabby's star) has shown anomalous drops in light flux. We perform a statistical analysis of the more numerous smaller dimming events by using methods found useful for avalanches in ferromagnetism and plastic flow. Scaling exponents for avalanche statistics and temporal profiles of the flux during the dimming events are close to mean field predictions. Scaling collapses suggest that this star may be near a nonequilibrium critical point. The large events are interpreted as avalanches marked by modified dynamics, limited by the system size, and not within the scaling regime.
恒星KIC8462852（塔比之星）的光通量出现了异常下降。我们通过使用对铁磁性和塑性流动中的雪崩有用的方法，对数量更多的较小变暗事件进行了统计分析。雪崩统计的标度指数和变暗事件期间通量的时间分布接近平均场预测。标度塌缩表明这颗恒星可能接近非平衡临界点。大事件被解释为具有修正动力学、受系统大小限制且不在标度范围内的雪崩。
