第23周太阳高能粒子特性分析

发布时间：2018-08-04 10:37

【摘要】：第23太阳周是距今最近的已经结束的太阳活动周,该周的太阳高能粒子(SEP)及相关现象有比较丰富的观测,通过对这些资料的分析,可以帮助我们更好地理解太阳高能粒子的加速与传播等现象,也可以帮助我们去思考和分析第24周的太阳高能粒子现象。目前已有很多关于高能粒子及有关现象的研究,但是,仍有许多现象未进行系统和深入的研究,如太阳高能粒子的日冕逃逸时间的系统分析,太阳高能粒子逃逸时CME和耀斑所处的状态等。日冕物质抛射(CME)和耀斑都可以导致产生太阳高能粒子事件,其中CME爆发时可能伴有Ⅱ型射电暴,而太阳耀斑爆发时通常伴有Ⅲ型暴。本文将对太阳高能粒子事件与日冕物质抛射、有关的耀斑以及米波和十米百米波(DH)Ⅱ型射电暴进行综合分析,以了解太阳高能粒子事件爆发时相关的太阳活动情况。本文研究认为,(1)伴随SEP的CME有更大概率伴随米波和DH波Ⅱ型射电暴。(2)伴有太阳高能粒子事件的CME速度比不伴随太阳高能粒子的CME的速度要大。(3)米波、DH波段Ⅱ型暴爆发、SEP粒子逃逸时间有明显的时序关系。(4)米波Ⅱ型暴的产生的起始高度一般在3个太阳半径(Rs)以内,DH波段Ⅱ型暴爆发的起始位置一般在8Rs以内。其中,有SEP伴随的米波Ⅱ型暴爆发高度平均值比没有SEP的低0.1Rs左右,有约33.3%的Ⅱ型暴是由CME的边缘驱动的激波产生的,无SEP的CME中事件,35.0%的Ⅱ型暴是由CME的边缘驱动的激波产生的。DH波段起始高度平均比没有SEP的高0.3Rs左右。(5)高能粒子的源区大多位于日面经度E20°以西,粒子释放的高度一般低于15Rs。随着经度的变化,太阳高能粒子在传播的路径、逃逸时间、逃逸的位置高度随经度分布没有显著变化。由上述结果,我们分析认为SEP的爆发可能与以下条件有关：(1)活动区产生多次CME,其产生SEP的概率比较大。当耀斑、米和DH波段Ⅱ型暴都出现时,有更高的概率产生SEP,但SEP不影响Ⅱ型暴从米波到DH波频漂的速度。(2)CME伴随SEP的概率与速度、活动区经度和CME的运动方式有关。CME速度越大,伴随SEP的概率越大。由于太阳高能粒子要沿磁力线传播,因此,太阳西半球CME产生的SEP比东半球产生的SEP更容易被地球附近的卫星观测到。在LASCO观测范围内作非匀速运动的CME产生SEP的概率比做匀速运动的CME更大,这些CME的平均速度比产生SEP且匀速运动的CME的速度大很多。(3)耀斑后4分钟之内观测到米波Ⅱ型暴的CME事件伴随SEP的概率比较大。(4)产生SEP的活动区在DH波段Ⅱ型暴的爆发高度范围的电子密度可能比没有SEP产生的活动区同高度的大。(5)CME速度越大,伴随Ⅱ型暴的概率也越大,且在其前沿产生Ⅱ型暴的概率也越大。相对而言,在CME前沿激波产生的Ⅱ型暴有更大的概率伴随SEP事件。CME边缘产生的Ⅱ型暴伴随SEP的概率则相对较小。
[Abstract]:The twenty-third solar week is the most recent solar week that has been completed. This week's solar energy particles (SEP) and related phenomena are more abundant. By analyzing these data, we can help us better understand the acceleration and propagation of high energy particles in the sun, and help us to think and analyze the twenty-fourth weeks too. There are many studies on high energy particles and related phenomena, but there are still many phenomena that have not been systematically and deeply studied, such as the system analysis of the solar energy particles' coronal escape time, the state of the CME and the flare when the solar energy particles escape.
Coronal mass ejection (CME) and flares can all lead to high energy particle events in the sun, in which CME eruptions may be accompanied by type II radio storms, while solar flares are usually accompanied by type III storms. This article will carry out the solar energetic particle events and coronal mass ejections, the related flares, and the rice and the ten meter wave (DH) type II radio storm. A comprehensive analysis is made to understand the solar activity associated with solar energetic particle events.
This study holds that (1) the CME with SEP is more likely to accompany Mi Bo and DH wave type II radio storms. (2) the velocity of CME accompanied by solar energetic particles is larger than that of the CME of the solar energetic particles. (3) Mi Bo, DH band type II burst and SEP particle escape time. (4) the emergence of Mi Bo type II storm The initial height is generally within 3 Solar radii (Rs), and the initial position of the DH band II type burst is generally within 8Rs. Among them, the height averages of the SEP accompanied by the type II burst are lower than 0.1Rs without SEP, and about 33.3% of the type II storms are generated by the excitation waves driven by the CME edge, no SEP in CME events, and 35% of the type II storm. The initial height of the.DH band generated by the shock wave driven by the edge of CME is about 0.3Rs higher than that of no SEP. (5) the source region of the high-energy particles is mostly located in the west of the daily longitude E20 degrees. The height of the particle release is generally lower than the 15Rs. with the longitude, and the height of the solar energy particles in the propagation path, escape time, and escape position is divided with the longitude. There was no significant change in the cloth.
From the above results, we think that the outbreak of SEP may be related to the following conditions: (1) the active region produces a number of CME, and the probability of producing SEP is larger. When the flare, rice and DH band II storm all appear, there is a higher probability to produce SEP, but SEP does not affect the velocity of the type II storm from the meter wave to the DH wave. (2) CME accompanying SEP's probability and speed The greater the.CME velocity associated with the movement of the active region and the movement of the CME, the greater the probability of the accompanying SEP. As the solar energy particles are propagating along the magnetic line of force, the SEP produced by the CME in the Western Hemisphere is more likely to be observed by the satellite near the earth than the SEP in the eastern hemisphere. In the LASCO observational range, the CME produced by the non uniform motion of the CME produces SEP. The rate of CME is greater than that of uniform motion. The average velocity of these CME is much greater than that of CME that produces SEP and uniform motion. (3) the probability of the CME event of the meter wave II storm within 4 minutes after the flare is larger than that of SEP. (4) the electron density of the active region of the DH band II type riot in the SEP is probably less than no SEP The greater the height of the active area is. (5) the greater the speed of (5), the greater the probability of the type II storm, and the greater the probability of producing type II storm in the front. Relatively, the probability of the type II storm generated by the CME front shock wave is relatively smaller than the probability of the type II storm accompanied by the SEP event on the edge of the SEP event.
【学位授予单位】：南京信息工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P182

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