arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0906.0336astro-ph.SR
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基于高分辨率图像重建技术的太阳活动区水平流研究

Study of horizontal flows in solar active regions based on high-resolution image reconstruction techniques

S. Vargas Dominguez

摘要:

本论文可以在一个更一般的概念框架内命名为“太阳物理学中的高分辨率”。论文的第一部分致力于高分辨率观测和图像恢复的主题。首先从理论上分析了大气湍流和仪器像差对成像质量的影响。这个问题迫使我们实施事后图像恢复技术,该技术添加到由自适应光学执行的实时校正,使我们的图像更接近现实。为了进行良好的太阳观测,克服地球大气层的负面影响,正在努力开发日出飞行任务。该项目包括一个气球飞行任务,将向平流层发射一个1米长的望远镜,并将以前所未有的时间、空间和光谱分辨率记录数据。日出的主要目的是研究太阳大气中磁结构的形成及其与对流等离子体流的相互作用。机载仪器成像磁仪实验(IMAX)将能够通过测量某些谱线中的光偏振来绘制广泛的太阳区域的磁场图。作为IMaX团队的一员,我开发了一种飞行中校准方法来表征影响IMaX图像的像差。论文的第二部分是太阳活动区水平流的研究。利用地面和空间观测数据以及重建技术恢复图像。我们专注于太阳活动区及其周围结构的自行。量化视野中的水平流的方法包括使用生成流图的局部相关跟踪技术。

英文摘要:

This thesis can be framed in a more general concept designated as "High resolution in solar physics". The first part of the thesis is dedicated to the topic of high-resolution observations and image restoration. It begins with a theoretical reviewing of the problem that represents the atmospheric turbulence and the instrumental aberrations on the image quality. This problem force us to implement post-facto image restoration techniques that, added to the real-time corrections performed by the Adaptive Optics, gives us images closer to reality. To have good solar observations overcoming the negative influence of the Earth' s atmosphere, one effort is being made with the development of the Sunrise mission. This project consists in a balloon-borne mission that will launch a 1-m telescope to the stratosphere and will record data with unprecedented temporal, spatial and spectral resolution. The main aim of Sunrise is to study the formation of magnetic structures in the solar atmosphere and their interaction with the convective plasma flows. The on-board instrument Imaging Magnetograph eXperiment (IMaX) will be able to produce magnetic field maps of extensive solar regions by measuring the light polarization in certain spectral lines. As a member of the IMaX team, I have developed an in-flight calibration method to characterize the aberrations affecting the images in IMaX. The second part of the thesis is centered on the study of horizontal flows in solar active regions. Data from ground-based and space observations are used as well as reconstruction techniques to restore the images. We focus on the proper motions of structures in and around solar active regions. The way to quantify the horizontal flows in the field-of-view consist of using local correlation tracking techniques that generate flow maps.

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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