论文标题
由于太阳周期内部旋转的变化，预测全球尺度太阳能罗斯比模式的频率变化
Predicting frequency changes of global-scale solar Rossby modes due to solar cycle changes in internal rotation
论文作者
论文摘要
语境。在最后两个太阳周期中，在太阳上观察到了大规模的赤道罗斯比模式。目标。我们研究了随时间变化的区域流对罗斯比模式频率的影响。方法。一阶扰动理论方法用于获得由于内部旋转速率扰动而导致模式频率中预期移动的表达式。结果。使用HelioSe震动反演的时变旋转，我们预测了在最后两个太阳周期中，Rossby模式频率的变化从M = 1到M = 15。对于M = 1模式，峰峰频率变化小于1 nhz，以M生长，并达到25 nhz，以M = 15。结论。鉴于由于有限模式寿命而导致的模式频率的观察不确定性，我们发现预测的频移接近可检测性的极限。
Context. Large-scale equatorial Rossby modes have been observed on the Sun over the last two solar cycles. Aims. We investigate the impact of the time-varying zonal flows on the frequencies of Rossby modes. Methods. A first-order perturbation theory approach is used to obtain an expression for the expected shift in the mode frequencies due to perturbations in the internal rotation rate. Results. Using the time-varying rotation from helioseismic inversions we predict the changes in Rossby mode frequencies with azimuthal orders from m = 1 to m = 15 over the last two solar cycles. The peak-to-peak frequency change is less than 1 nHz for the m = 1 mode, grows with m, and reaches 25 nHz for m = 15. Conclusions. Given the observational uncertainties on mode frequencies due to the finite mode lifetimes, we find that the predicted frequency shifts are near the limit of detectability.
