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arXiv 2210.02635astro-ph.SRcs.CV
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光球亮点群的数量和亮度演化特征研究

Research on the quantity and brightness evolution characteristics of Photospheric Bright Points groups

HaiCheng Bai

摘要:

上下文光球亮点作为光球中最小的磁性元素和磁通量管的足迹示踪物,对光球的研究具有重要意义。与研究少数特定BP的特征和演变相比,对BP群体的研究可以让我们更好地了解BP群体的特征和整体活动。目标。我们的目标是找出的亮度和数量的BP组在不同的亮度水平的演变特征,以及这些特征之间的安静和活跃的地区有何不同。方法.提出了一种结合传统技术和神经网络的混合BP检测模型(HBD模型)。利用该模型检测并计算了一对BBSO在TiO波段活动区和静止区的连续高分辨率图像序列的每帧BP亮度特性。使用机器学习聚类方法,将每帧的PB按亮度从低到高分为四个级别组(level 1-level 4)。最后,利用傅里叶变换和逆傅里叶变换分析了这四个能级组中BPs的亮度和数量的演化。结果BP团体的活动并不是随机和无序的。在不同的亮度水平下,它们的数量和亮度演化呈现复杂的变化。在四种亮度水平中,活动区的BP比安静区的BP更活跃、更强烈。而安静区的BPs群数量和亮度演化在中、高亮度水平(level 3和level 4)表现出周期性变化大、周期性变化小的特点。光子带隙群的亮度在安静区的演化具有明显的周期性变化,而在活动区则处于完全随机的剧烈涨落状态。

英文摘要:

Context. Photospheric bright points (BPs), as the smallest magnetic element of the photosphere and the footpoint tracer of the magnetic flux tube, are of great significance to the study of BPs. Compared with the study of the characteristics and evolution of a few specific BPs, the study of BPs groups can provide us with a better understanding of the characteristics and overall activities of BPs groups. Aims. We aim to find out the evolution characteristics of the brightness and number of BPs groups at different brightness levels, and how these characteristics differ between quiet and active regions. Methods. We propose a hybrid BPs detection model (HBD Model) combining traditional technology and neural network. The Model is used to detect and calculate the BPs brightness characteristics of each frame of continuous high resolution image sequences of active and quiet regions in TiO-band of a pair of BBSO. Using machine learning clustering method, the PBs of each frame was divided into four levels groups (level1-level4) according to the brightness from low to high. Finally, Fourier transform and inverse Fourier transform are used to analyze the evolution of BPs brightness and quantity in these four levels groups. Results. The activities of BPs groups are not random and disorderly. In different levels of brightness, their quantity and brightness evolution show complex changes. Among the four levels of brightness, BPs in the active region were more active and intense than those in the quiet region. However, the quantity and brightness evolution of BPs groups in the quiet region showed the characteristics of large periodic changes and small periodic changes in the medium and high brightness levels (level3 and level4). The brightness evolution of PBs group in the quiet region has obvious periodic changes, but the active region is in a completely random and violent fluctuation state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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