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arXiv 1604.03384astro-ph.SR
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与大耀斑有关的前体太阳耀斑时空分布的统计研究

Statistical study of spatio-temporal distribution of precursor solar flares associated with major flares

N. Gyenge, I. Ballai, T. Baranyi

摘要:

本次调查的目的是研究M级和X级大耀斑前24小时间隔内前兆耀斑的时空分布以及后续耀斑的演变。有关耀斑(前兆和后续)的信息由拉马迪高能太阳光谱成像仪(RHESSI)提供。耀斑列表,而主要耀斑是由地球静止业务环境卫星(GOES)系统卫星在2002年至2014年期间观测到的。根据主耀斑的类型,在大约一天的时间内,相关耀斑的时空分布存在明显的演化差异。空间分布的特点是归一化的频率分布的数量$δ$(之间的距离主要耀斑和其前身耀斑标准化的太阳黑子群直径)在四个6小时的时间间隔之前的主要事件。X级耀斑的前兆在大耀斑发生前的半天多时间内呈双峰型空间分布,但在大耀斑发生前的6小时左右,前兆的空间分布变为对数正态分布。M级耀斑的前兆在每个6小时子区间内呈对数正态分布。在每种情况下,活动区中前兆最频繁的地点都在距离大耀斑地点约0.1直径太阳黑子群的距离内。我们的研究表明,能量的积累比能量的释放更有效,因为前体。

英文摘要:

The aim of the present investigation is to study the spatio-temporal distribution of precursor flares during the 24-hour interval preceding M- and X-class major flares and the evolution of follower flares. Information on associated (precursor and follower) flares is provided by Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI). Flare List, while the major flares are observed by the Geostationary Operational Environmental Satellite (GOES) system satellites between 2002 and 2014. There are distinct evolutionary differences between the spatio-temporal distributions of associated flares in about one day period depending on the type of the main flare. The spatial distribution was characterised by the normalised frequency distribution of the quantity $δ$ (the distance between the major flare and its precursor flare normalised by the sunspot group diameter) in four 6-hour time intervals before the major event. The precursors of X-class flares have a double-peaked spatial distribution for more than half a day prior to the major flare, but it changes to a lognormal-like distribution roughly 6 hours prior to the event. The precursors of M-class flares show lognormal-like distribution in each 6-hour subinterval. The most frequent sites of the precursors in the active region are within a distance of about 0.1 diameter of sunspot group from the site of the major flare in each case. Our investigation shows that the build-up of energy is more effective than the release of energy because of precursors.

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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