AI 中文总结
研究通过将适用于太阳的方法用于红巨星KIC 9145955，纳入小尺度磁场，利用人工修改爱丁顿T - τ关系模拟磁场效应，匹配观测频率，发现小尺度磁场并修正恒星参数。
AI 中文摘要
近期星震学研究发现三颗红巨星存在磁场。对太阳和HD 49385的小尺度磁场研究表明其对观测与理论频率间的系统差异有修正作用。本文将类似太阳的方法应用于红巨星KIC 9145955，通过人工修改爱丁顿T - τ关系模拟磁场效应。结果显示最佳拟合模型计算频率与观测的l = 0、1和2模式完美匹配，表明存在强度上限65 G且集中在光球层13,100 km高度的小尺度磁场，并据此修正了KIC 9145955的恒星参数。
英文摘要
Recent convincing evidence is found within asteroseismology that suggests the magnetic fields exist in three red giants. Research on small-scale magnetic fields in the Sun and HD 49385 has shown that they have a certain corrective effect on the systematic discrepancies between observed and theoretical frequencies. Here we apply a similar method applied for the Sun to a red giant, KIC 9145955, to explore the impact of small-scale magnetic fields in the photosphere on its frequencies. We find that the calculated frequencies of our best-fit model, which simulates the effect of the magnetic fields by artificially modifying the Eddington $T-τ$ relation, perfectly match those of the observed l = 0, 1, and 2 modes, indicating the existence of small-scale magnetic fields with an upper strength limit of 65 G and concentrating at a height 13,100 km in the photosphere. Based on the best-fit model, we revise the stellar parameters of KIC 9145955 as: $M = 1.23\pm0.04\,M_\odot$, $R = 5.57\pm0.06\,R_\odot$, $L = 19.85\pm0.5\,L_\odot$, $Age = 3.83\pm0.5$\,Gyr, $M_{\rm He} = 0.2108\pm0.0005M_\odot$, and $R_{\rm He} = 0.0306\pm0.0001R_\odot$.
Commentshas been published in ApJ
