YNAO OpenIR  > 选址与日冕观测组
Alternative TitleResearch on the Dynamic Feature of the Solar Transition Region and the Rule of the Earth's Atmosphere Scattering the Solar Radiation
Thesis Advisor刘煜 ; 田晖
Degree Grantor中国科学院研究生院(云南天文台)
Place of Conferral北京
Degree Discipline天体物理
Keyword过渡区 黑子 日冕 光度计
Abstract太阳是宇宙中离地球最近的恒星,与人类关系最为密切,太阳内部释放的能量最终都要经过太阳大气传播到日地空间。太阳过渡区位于太阳大气中色球和日冕之间,联系了太阳大气的低层和高层,它在日冕加热和太阳风形成的过程中起着关键作用。因此,对太阳过渡区性质的研究具有极其重要的意义。 近期的研究发现,过渡区本身是非常不均匀和动态的,各种瞬态事件频繁发生,动态特征是太阳过渡区的重要性质。本文前三章详细研究了过渡区的动态特征。具体来说,这三章包括以下内容: 第一章,对太阳过渡区的动态结构特征进行概述。网络组织是过渡区的主要结构,过渡区频发的瞬变事件如爆发事件、日冕亮点、针状体等反映了过渡区的动态特征。 第二章,对SUMER光谱仪及其数据分析方法进行全面介绍,本文所用的数据主要就来自SUMER/SOHO仪器。本章介绍了该仪器的结构、性能,原始数据的处理、校正的基本步骤,另外还简单介绍了光谱分析的一些重要基础知识。 第三章,利用谱线的强度、多普勒速度和宽度三个主要参量,分析了太阳黑子过渡区的一个振荡事件的主要性质。结合了当前对过渡区振荡行为的各种解释,包括流动说、驻波解释、行波解释,简单介绍了它们的主要观测证据,然后与NOAA 8378 的黑子过渡区振荡事件加以比较。我们发现它的周期大约2.3-3.2min,与黑子的3 min本影振荡周期比较符合。但实际上这一事件比早期报道的要复杂,体现在它变化的周期和谱线相位差上等,我们的分析表明它并不是一个单纯的行波。 现今我国太阳物理正处于快速发展时期,新一轮的太阳设备西部选址已提上议程。选址需要的大气各种参数,包括消光指数、积分水汽、透明度等可由日晕光度计的多波段日晕数据提供。日晕是地球大气对太阳辐射的散射,其强度和变化规律对于选址乃至了解地球大气和太阳辐射的相互作用机制都是十分重要的。 本文第四章介绍了这方面的初步观测结果。首先简单介绍了仪器结构、主要参数以及测量日晕的基本原理,然后对多址点的观测结果进行了比较,得出在我们分析的四个地点中轿子雪山具有最低的日晕强度。原因是在它四个点中具有最高的海拔,其次远离城市,且相对高差超过3000米,因此空气含尘量极低。对同一地点,靠近中午时候的日晕强度最低。这些结果为日晕规律的进一步研究提供重要参考。 第一章,对太阳过渡区的动态结构特征进行概述。网络组织是过渡区的主要结构,过渡区频发的瞬变事件如爆发事件、日冕亮点、针状体等反映 了过渡区的动态特征。 第二章,对SUMER光谱仪及其数据分析方法进行全面介绍,本文所用的数据主要就来自SUMER/SOHO仪器。本章介绍了该仪器的结构、性能,原始 数据的处理、校正的基本步骤,另外还简单介绍了光谱分析的一些重要基础知识。 第三章,利用谱线的强度、多普勒速度和宽度三个主要参量,分析了太阳黑子过渡区的一个振荡事件的主要性质。结合了当前对过渡区振荡行为 的各种解释,包括流动说、驻波解释、行波解释,简单介绍了它们的主要观测证据,然后与NOAA 8378 的黑子过渡区振荡事件加以比较。我们发 现它的周期大约2.3{3.2min,与黑子的3 min本影振荡周期比较符合。但实际上这一事件比早期报道的要复杂,体现在它变化的周期和谱线相位 差上等,我们的分析表明它并不是一个单纯的行波。 现今我国太阳物理正处于快速发展时期,新一轮的太阳设备西部选址已提上议程。选址需要的大气各种参数,包括消光指数、积分水汽、透明度 等可由日晕光度计的多波段日晕数据提供。日晕是地球大气对太阳辐射的散射,其强度和变化规律对于选址乃至了解地球大气和太阳辐射的相互 作用机制都是十分重要的。 本文第四章介绍了这方面的初步观测结果。首先简单介绍了仪器结构、主要参数以及测量日晕的基本原理,然后对多址点的观测结果进行了比较 ,得出在我们分析的四个地点中轿子雪山具有最低的日晕强度。原因是在它四个点中具有最高的海拔,其次远离城市,且相对高差超过3000米, 因此空气含尘量极低。对同一地点,靠近中午时候的日晕强度最低。这些结果为日晕规律的进一步研究提供重要参考。
Other AbstractThe sun is the nearest star to the earth in our universe, which makes it the most intimate with mankind. The energy released in the inner sun will ultimately get through the solar atmosphere to reach the solar-terrestrial space. The solar transition region (TR), which connects the lower and upper parts of the solar atmosphere, is a layer between the chromosphere and corona. The TR plays an important role in the processes of coronal heating and the formation of the solar wind. So, it's important to study the property of the solar TR. Recent research shows that the TR is extremely inhomogeneous and dynamic. Transient events of different properties occur frequently in the TR. The first three chapters of this thesis focus on the dynamic feature of the TR. Chapter one gives a general description of the structure and dynamic feature of the TR. Network is the dominant structure of the solar TR. Transient events such as explosive events, coronal bright point, spicules, etc. occur very frequently in the TR. Chapter two is a comprehensive introduction of the SUMER spectrometer and the analytic method of the SUMER data. This chapter introduces the architecture and the specification of the instrument as well as the main steps of raw data correction and calibration. In addition, some basic knowledge of spectral line analysis is also introduced in this chapter. In Chapter three, we analyze one oscillation event in the sunspot TR by studying the evolution of the intensity, Doppler velocity and width of TR emission lines. Current explanations of TR oscillation events include flows, standing waves and propagating waves. We find that the oscillation event in NOAA 8378 has a period of 2.3-3.2 min, which is similar to the well-known 3 min umbral oscillation in sunspots. However, through a detailed analysis of the period and phase difference between line parameters, we suggest that this oscillation is far more complex than a pure propagating sound wave. Research in solar physics in our country is developing rapidly in recent years. A new term of site survey is raised to agenda. Some parameters that are needed for the site survey, including extinction coeffcient, total precipitable water vapor content and air transparency can be partly offered by multi-wavelength sky brightness datameasured by the Sky Brightness Monitor (SBM). Sky brightness is the scattering light of solar radiation. The intensity and the change of the sky brightness are vital to the site survey and even to the understanding of the interaction between the earth's atmosphere and the solar radiation. Chapter four of this thesis introduces some preliminary observational results in this aspect. First, it briefly introduces the architecture of the SBM, major specifications and the principle of the sky brightness measurement, and then compares the results from multi-sites. Among the four sites we analyze, JiaoZi Snow Mountain has the lowest sky brightness. The main reason should be due to the fact that it has the highest altitude among the four sites. Secondly, it's far from cities and its relative height is over 3000 meters, which makes its air with less dust. In the same location, the sky brightness is lowest near noon time. These preliminary results are useful for the future sky brightness research of the site survey project.
Subject Area天文学
Document Type学位论文
Recommended Citation
GB/T 7714
刘念平. 太阳过渡区动态特征及地球大气对太阳辐射散射规律的研究[D]. 北京. 中国科学院研究生院(云南天文台),2011.
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