论文标题
源自高分辨率观察的伞形点的物理特征
Physical Characteristics of Umbral Dots Derived from a High Resolution Observation
论文作者
论文摘要
这项研究的目的是重新审视Umbral Dots（UDS）的物理参数，并具有最新的高分辨率观察结果，并有助于对其形成和进化的科学理解。在这项研究中，我们应用了一种粒子跟踪算法来检测2015年6月14日Goode Solar望远镜（GST）的NOAA AR12384中的UDS。我们分析了平均位置分布，位置依赖性和检测到的总计2892 UD的一般特性，并在其寿命中分别分别分别，以及仅选择10个长寿的UD的周期性行为。我们发现； i) brightest, largest, fastest and most elliptic UDs tend to be located at the umbra-penumbra boundary while their lifetime does not display any meaningful location dependency, ii) average dynamic velocity of all detected UDs is about twice (0.76 km/s) of the previously reported average values, iii) obtained trajectories from the longest living 354 UDs show that they have generally inward motion, iv) chosen 10 long living UDs通常具有类似的周期性行为，显示8.5-32、3.5-4.1、1.5-1.9和1.1-1.3分钟，v）通常，检测到的UDS具有椭圆形，平均偏心率为0.29，标准偏差为0.11，标准偏差为0.11，vi）较大的UD往往更椭圆形，更具动态性。
The aim of this study is revisit the physical parameters of umbral dots (UDs) with the latest high resolution observations and contribute to the scientific understanding of their formation and evolution. In this study, we applied a particle tracking algorithm for detecting UDs in NOAA AR12384 observed on June 14, 2015 by the Goode Solar Telescope (GST). We analyzed average position distributions, location dependencies, and general properties of detected total 2892 UDs separately during their life time and the periodic behavior of only selected 10 long living UDs. We found; i) brightest, largest, fastest and most elliptic UDs tend to be located at the umbra-penumbra boundary while their lifetime does not display any meaningful location dependency, ii) average dynamic velocity of all detected UDs is about twice (0.76 km/s) of the previously reported average values, iii) obtained trajectories from the longest living 354 UDs show that they have generally inward motion, iv) chosen 10 long living UDs generally have similar periodic behavior showing 8.5-32, 3.5-4.1, 1.5-1.9, and 1.1-1.3 minutes periodicities, v) generally, detected UDs have an elliptical shape with the averaged eccentricity of 0.29, with a 0.11 standard deviation, vi) larger UDs tend to be more elliptic and more dynamic.
