一类X射线发射度在脉冲相具有显著指数增长特征的太阳耀斑

发布时间：2018-04-21 16:45

本文选题：粒子加速 + 等离子体　；参考：《天文学报》2012年06期

【摘要】：太阳耀斑脉冲相的X射线光变曲线的复杂性表明此阶段有多种物理过程参与其中.基于某些显著的观测特征对耀斑分类可以用来探索这些特征的物理起源.对GOES(Geostationary Operational Environmental Satellite)卫星观测数据的分析表明有一类X射线发射度在脉冲相呈显著指数增长的耀斑.指数增长阶段的平均温度为正态分布.在此温度分布1σ之内的大多数耀斑属于B级或C级耀斑,其GOES低通道流量的峰值分布为对数正态分布.指数增长相的增长率和持续时间也遵循对数正态分布.持续时间分布范围大概为几十秒到几千秒.正如所预期的,增长时标同软X射线的衰减时标具有相关性.此外,指数增长相的增长率与持续时间呈强烈的反相关,而且随增长率的增大,对应的平均温度也有缓慢增大的趋势.
[Abstract]:The complexity of X-ray photoluminescence curve of solar flare pulse phase indicates that there are many physical processes involved in this phase. The classification of flares based on some observational features can be used to explore the physical origin of these features. The analysis of GOES(Geostationary Operational Environmental satellite data shows that there is a kind of flares whose X-ray emittance increases exponentially in the pulse phase. The average temperature of exponential growth stage is normal distribution. Most flares within 1 蟽 of this temperature distribution belong to B or C flares, and the peak distribution of GOES low channel flow is logarithmic normal distribution. The growth rate and duration of exponential growth phase also follow logarithmic normal distribution. Duration ranges from tens to thousands of seconds. As expected, the growth time scale is correlated with the attenuated time scale of soft X rays. In addition, the growth rate of the exponential growth phase is strongly inversely correlated with the duration, and the corresponding average temperature increases slowly with the increase of the growth rate.
【作者单位】：中国科学院紫金山天文台;中国科学院暗物质与空间天文重点实验室;中国科学院研究生院;
【基金】：国家自然科学基金项目(11143007,11173063,11173064) 973项目(2011CB811402)资助
【分类号】：P182.52

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