【摘要】：磁螺度是表征磁場扭曲與環(huán)繞程度的物理量，它在太陽大氣中衰減的極為緩慢。對光球?qū)哟怕荻冗M(jìn)行測量表明，太陽南半球有更多的正磁螺度注入而北半球有更多的負(fù)磁螺度的注入�？紤]到磁螺度在太陽大氣中幾乎不衰減，這種半球注入的不平衡將會導(dǎo)致磁螺度在各自所在半球的大氣內(nèi)不斷的積累。這些在太陽大氣中積累的磁螺度很可能會觸發(fā)諸如耀斑、暗條/日珥爆發(fā)、日冕物質(zhì)拋射等太陽活動。同時，在包括太陽爆發(fā)事件在內(nèi)的各種太陽活動中，幾乎都找到了磁螺度存在的證據(jù)。這些都表明，研究磁螺度對于解釋太陽活動具有重要意義。 盡管磁螺度在太陽活中研究存在著重要的意義，關(guān)于太陽上磁螺度的起源，我們卻知之甚少。而最近的一項關(guān)于磁螺度不對稱性的研究為解決活動區(qū)磁螺度起源帶來了曙光。但是這項研究急需解決一些問題，于是本文對這個發(fā)現(xiàn)進(jìn)行了更深入的研究。本文將DAVE算法應(yīng)用到SDO/HMI12分鐘視向磁圖，分別對9個偶極新浮現(xiàn)區(qū)的兩極計算了磁螺度注入。計算結(jié)果驗證了偶極浮現(xiàn)區(qū)磁螺度注入存對極性的偏好。但與之前研究中大部分活動區(qū)表現(xiàn)為先導(dǎo)極性注入更多的磁螺度這一結(jié)果不同，本文中6個活動區(qū)表現(xiàn)為后隨極性有更多的磁螺度注入。于是本文提出，，也許不能簡單的認(rèn)為偶極活動區(qū)的先導(dǎo)極性在磁螺度注入中更占優(yōu)勢。本文根據(jù)活動區(qū)磁通量之和的演化，將活動區(qū)的浮現(xiàn)過程分成了兩個階段，并發(fā)現(xiàn)磁螺度通量在兩階段有明顯不同的表現(xiàn)。
[Abstract]:Magnetic helicity is a physical quantity representing the degree of distortion and circumference of magnetic field, which attenuates very slowly in the solar atmosphere. The measurements of the magnetic helicity of the photosphere show that there are more positive magnetic helicity injection in the southern hemisphere and more negative magnetic helicity injection in the northern hemisphere. Considering that the magnetic helicity is almost unattenuated in the solar atmosphere, this hemispherical injection imbalance will lead to the continuous accumulation of the magnetic helicity in the atmosphere of the respective hemispheres. The magnetic helicity accumulated in the solar atmosphere is likely to trigger solar activity such as flares, strip / prominence bursts, and coronal mass ejections. At the same time, almost all kinds of solar activities, including solar eruptions, have found evidence of magnetic helicity. All these indicate that the study of magnetic helicity is of great significance for the interpretation of solar activity. Although the study of magnetic snails is of great significance in solar life, little is known about the origin of magnetic snails on the sun. A recent study on the asymmetry of magnetic helicity provides the dawn for solving the origin of magnetic helicity in active regions. However, this study urgently needs to solve some problems, so this paper makes a more in-depth study of this discovery. In this paper, the DAVE algorithm is applied to the SDO/HMI12 minute apparent magnetic map, and the magnetic helicity injection is calculated for the two poles of nine new emerging dipoles. The calculated results verify the preference of magnetic helicity injection for polarity in the dipole emerging region. However, most of the active regions in this paper are different from the results of leading polarity injection with more magnetic helicity. In this paper, the six active regions show that there are more magnetic helicity injection with the polarity. It is suggested in this paper that the leading polarity of the dipole active region may not be considered to be more dominant in the magnetic helicity injection. In this paper, according to the evolution of the sum of magnetic flux in the active region, the emerging process of the active region is divided into two stages, and it is found that the flux of magnetic snail is obviously different in the two stages.
【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】：2014
【分類號】：P182.9

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 汪景t;季海生;;空間天氣驅(qū)動源——太陽風(fēng)暴研究[J];中國科學(xué):地球科學(xué);2013年06期

2 Jun-Chao Hong;Yun-Chun Jiang;Jia-Yan Yang;Rui-Sheng Zheng;Yi Bi;Hai-Dong Li;Bo Yang;Dan Yang;;Twist in a polar blowout jet[J];Research in Astronomy and Astrophysics;2013年03期

本文編號：2224205