本文關(guān)鍵詞：太陽活動區(qū)的觀測與分析　出處：《中國科學(xué)院研究生院(云南天文臺)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 太陽活動區(qū) 暗條爆發(fā) 磁場衰減指數(shù) 冕環(huán)震蕩 冕環(huán)追蹤

【摘要】：太陽作為離我們最近的一顆恒星,不但為我們帶來了光明和溫暖,也影響著我們生活的方方面面。對太陽的研究一直是天文學(xué)的一個重要分支。太陽活動區(qū)通常指太陽上強(qiáng)磁場周圍活動現(xiàn)象比較頻繁的區(qū)域。隨著觀測手段以及技術(shù)水平的提高,尤其是越來越多的高分辨率空間和地面太陽望遠(yuǎn)鏡投入使用,使我們采集到了大量的太陽活動區(qū)數(shù)據(jù),也發(fā)現(xiàn)了許多令人驚奇的太陽活動現(xiàn)象。這些太陽活動現(xiàn)象不僅與空間天氣以及地球氣候狀況有著非常密切的聯(lián)系,而且也為我們研究基礎(chǔ)空間極端條件下等離子體表現(xiàn)提供了大量的數(shù)據(jù)基礎(chǔ)。太陽活動區(qū)內(nèi)存在著黑子、耀斑、日珥和日冕物質(zhì)拋射等多種現(xiàn)象,這些現(xiàn)象的存在都與太陽磁場有密切的聯(lián)系。首先磁場可以提供的磁壓力和磁張力來支撐太陽大氣中致密的等離子體物質(zhì),從而使其可以保持在空中不會因?yàn)橹亓Χ侣?其次磁場也可以在一定程度上阻礙熱交換,這就使得冷的等離子體也可以穩(wěn)定的存在于更熱的太陽大氣之中;最后磁場中儲存的磁能如果被釋放出來則可以驅(qū)動劇烈的太陽活動現(xiàn)象。但是由于太陽活動區(qū)復(fù)雜的大氣環(huán)境和磁場中等離子體本身復(fù)雜的特性,太陽活動區(qū)內(nèi)詳細(xì)的物理過程和演化規(guī)律一直沒有被很好的理解。更加詳細(xì)的研究以及更加深入的分析,毫無疑問都需要更多的觀測數(shù)據(jù)和觀測現(xiàn)象作為基礎(chǔ)。圍繞大量的太陽活動區(qū)高時間和空間分辨率的觀測數(shù)據(jù),我們對太陽活動區(qū)內(nèi)的一些典型的現(xiàn)象進(jìn)行了一些分析和研究。這里我們呈現(xiàn)了幾個不同種類爆發(fā)暗條周圍磁場衰減指數(shù)的空間分布情況。對比的結(jié)果表明不同種類的爆發(fā)暗條周圍磁場衰減指數(shù)的分布也有著一定的區(qū)別。我們還首次發(fā)現(xiàn)部分爆發(fā)暗條周圍存在衰減指數(shù)分布反常的區(qū)域,在這些反常的區(qū)域呈現(xiàn)出上下相鄰的兩個斑塊,它們具有著相對陡峭的衰減指數(shù),觀測也表明這些異常的區(qū)域同暗條發(fā)生爆發(fā)斷裂的位置有著良好的對應(yīng)關(guān)系。對磁場拓?fù)浣Y(jié)構(gòu)的分析則表明這些衰減指數(shù)分布反常的區(qū)域中磁場聯(lián)通性有著很強(qiáng)烈的變化,更進(jìn)一步分析表明這些磁場衰減指數(shù)分布異常的區(qū)域位于某些特殊的準(zhǔn)磁分界層(QSL),而在準(zhǔn)分界層和衰減指數(shù)異常區(qū)域的分布的關(guān)系以及物理模型方面我們也做了一定的研究,也提出了一種可能的模型來解釋這類典型的部分暗條爆發(fā)現(xiàn)象。此外我們也研究了2015年6月18日發(fā)生的一個很明顯的冕環(huán)振蕩事件。觀測結(jié)果表明相鄰的一束冕環(huán)中不同冕環(huán)的振蕩情況有著很大的不同,它們的周期和振幅都存在著很大的差異。另外我們也發(fā)現(xiàn)同一個冕環(huán)不同位置的振蕩也有著明顯的差別,在遠(yuǎn)離耀斑源的位置的振蕩經(jīng)歷了一個阻尼過程,而靠近耀斑源的那部分冕環(huán)振動幅度則有著一個增加的過程,我們對此進(jìn)行了簡單的理論分析,結(jié)果表明該現(xiàn)象可能是由于冕環(huán)不同位置受到?jīng)_擊的角度的不同所產(chǎn)生。最后我們還針對相位一致性方法增強(qiáng)圖像提出一個新的冕環(huán)識別方法(簡稱PCB),該方法依據(jù)冕環(huán)形態(tài)變化比較平緩的形態(tài)學(xué)特性,將冕環(huán)識別方向限制在一個較小的范圍之內(nèi),并且首次將識別過程中推進(jìn)方向的變化情況和識別點(diǎn)的相位一致性大小同時作為終止識別的判據(jù)。對多組數(shù)據(jù)的識別和分析則表明相位一致性方法增強(qiáng)的圖像的確很適合被用于冕環(huán)識別,而我們提出的PCB方法所識別的冕環(huán)結(jié)構(gòu)則同時有著很好的完整性和準(zhǔn)確性,是一套現(xiàn)實(shí)可行的冕環(huán)自動識別方法。
[Abstract]:The sun as a star from us recently, not only bring us a bright and warm, also affects every aspect of our lives. The study on the sun has been an important branch of astronomy. The solar active region on the sun usually refers to a strong magnetic field around the activities more frequent area. With the means of observation and to improve the technical level, especially more and more high resolution space and ground-based solar telescope is put into use, we collected a large amount of data on solar activity, also discovered many amazing solar activities. These solar activities not only has a close relationship with the space weather and climate conditions, but also provides a data foundation for us to study basic space plasmas under extreme conditions. Solar activity in the region there are sunspots, flares, and coronal prominence Mass ejections and other phenomena, these phenomena are connected with the solar magnetic field. The first magnetic pressure and magnetic tension can be provided to support the dense plasma substance in the solar atmosphere, so that it can keep in the air will not fall because of gravity; the magnetic field can also impede heat exchange in a certain extent, which makes the cold plasma can also exist in the hot atmosphere of the sun; finally the magnetic field in the stored magnetic energy is released if can be driven by intense solar activity phenomena. But because of the characteristics of the atmospheric environment of solar active region and complex magnetic field plasma complex, solar activity in the region with the physical the process of evolution and has not been well understood. More detailed study and more in-depth analysis, there is no doubt that it needs more data And observations as a basis. The observation data around the high spatial and temporal resolution of the solar active region on the sun, our activities in the area of some typical phenomena are analyzed and studied. Here we present several different types of filament eruption around the distribution of magnetic field attenuation index space. The results indicate that the different types of the outbreak of a dark ambient magnetic field attenuation index distribution also have some differences. We also found that for the first time around a part of the outbreak of the dark decay index distribution of anomalous region in these anomalous area exhibits two patches on adjacent, they have a relatively steep attenuation index, the observation also shows that these abnormal with the occurrence of fracture occurred in the dark region position has a good corresponding relation. The analysis of magnetic field topology indicates that these anomalous attenuation index distribution In the area of the magnetic field has a very strong Unicom changes, further analysis shows that the magnetic field attenuation index abnormal distribution area is located in some special quasi magnetic boundary layer (QSL), and in the relationship between quasi boundary layer and attenuation distribution index abnormal area and the physical model we also do some research, also put forward a possible model to explain this kind of typical part of the filament explosion phenomenon. In addition, we also study a very obvious coronal loop oscillations of incidents in June 18, 2015. The observation results showed that the different coronal loop oscillations of a coronal loop in adjacent beam is very different, their period and amplitude there is a big difference. We also found the same coronal loop oscillations in different positions have obvious difference, a damping process in the oscillation source location away from the flare, but close to Yao The crown ring spot source vibration amplitude has an increase in the process, we conducted a simple theoretical analysis results show that this phenomenon may be due to the impact of the coronal loop in different positions of different angles generated. Finally we also according to the method of phase congruency enhanced image and proposed a new crown loop identification method (PCB), the method based on morphological characteristics of coronal loop morphological changes slowly, the coronal loop recognition within the limits of a smaller range, and for the first time, the consistency of phase size in the process of recognition of the advancing direction changes and recognition at the same time as the termination criterion. The identification and analysis of recognition the multi group data show that the image enhancement method of phase congruency is very suitable to be used in coronal loop recognition, coronal loop structure of PCB we put forward the method of recognition is also a good end Integrity and accuracy are a practical and feasible method for automatic identification of coronal rings.

【學(xué)位授予單位】：中國科學(xué)院研究生院(云南天文臺)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P182

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本文編號：1410723