论文标题
分析用于检测新兴活性区域的时间距离的热疗学
Analysis of Time-Distance Helioseismology for Detection of Emerging Active Regions
论文作者
论文摘要
与Ilonidis等人（2011年）相似的时距性热震技术相似，应用于两个独立的地下声速扰动的独立数值模型，以确定相位旅行时间移动测量值的空间分辨率和准确性。该技术还用于检查Michelson Doppler Imager（MDI）和Helioseiscic磁成像仪（HMI）观察到的几个活性区域的出现前特征。在对安静的太阳区域进行类似测量的背景下，五个研究的活动区域中有三个显示出强大的相位行进时间在出现前几个小时变化。这些结果构成了讨论在派生相位行进时间图中噪声的基础，以及区分新兴通量的真实和假阳性检测的可能标准。
A time-distance helioseismic technique, similar to the one used by Ilonidis et al (2011), is applied to two independent numerical models of subsurface sound-speed perturbations to determine the spatial resolution and accuracy of phase travel time shift measurements. The technique is also used to examine pre-emergence signatures of several active regions observed by the Michelson Doppler Imager (MDI) and the Helioseismic Magnetic Imager (HMI). In the context of similar measurements of quiet sun regions, three of the five studied active regions show strong phase travel time shifts several hours prior to emergence. These results form the basis of a discussion of noise in the derived phase travel time maps and possible criteria to distinguish between true and false positive detection of emerging flux.
