基于三维区域标记对太阳活动区低色球层亮点的统计分析
发布时间：2018-10-26 08:40
【摘要】：研究太阳活动能量的统计分布,以探索日冕物质加热的物理机制.利用一种基于三维区域标记的算法,使用"日出"卫星拍摄的低色球层λ3968.5单色像时间序列,观测一个处于衰减阶段且爆发频繁的活动区,对多个数量级尺度的亮点进行识别和统计.获得了2.09×104个亮点样本,分析了太阳耀斑基本物理量的频数分布与幂律的关系,以及影响该分布的观测效应.数据分析的主要结果如下:1)低色球层亮点的尺度、面积、光通量服从幂律分布.2)寿命的频数在中等时标呈幂律分布,在长时标呈指数分布;大尺度亮点的等待时间符合指数分布.3)亮点发生率的信噪比随其尺度的增加而减小;小尺度亮点持续的产生有可能向日冕稳定地提供能量.4)微小尺度亮点的频数低于幂律分布,相当程度上受观测数据的低时间分辨率所造成的低采样率影响.
[Abstract]:The statistical distribution of solar active energy is studied to explore the physical mechanism of coronal mass heating. Using an algorithm based on 3D region marking and using the low chromospheric 位 3968.5 monochromatic image time series taken by Sunrise satellite, we observe an active region which is in the stage of attenuation and erupts frequently. The bright spots of several orders of magnitude are identified and counted. A sample of 2.09 脳 104 bright spots is obtained. The relationship between the frequency distribution of the basic physical quantities of solar flares and the power law and the observational effects affecting the distribution are analyzed. The main results of the data analysis are as follows: 1) the scale, area and luminous flux of the bright spots in the low color sphere are distributed from power law to power law. 2) the frequency of lifetime is power law distribution in medium time scale and exponential distribution in long time scale; The waiting time of the large scale bright spot accords with the exponential distribution. 3) the SNR of the bright spot rate decreases with the increase of the scale. The continuous generation of small scale highlights is likely to supply the coronal energy stably. 4) the frequency of the small scale highlights is lower than the power law distribution, which is influenced by the low sampling rate caused by the low temporal resolution of the observed data.
【作者单位】： 北京师范大学天文系;中国科学院太阳活动重点实验室;
【基金】：国家自然科学基金资助项目(U1231104;11533009;10921303;11221063;41174153) 中国科学院太阳活动重点实验室基金资助项目(201512)
【分类号】：P182
，
本文编号：2295177
[Abstract]:The statistical distribution of solar active energy is studied to explore the physical mechanism of coronal mass heating. Using an algorithm based on 3D region marking and using the low chromospheric 位 3968.5 monochromatic image time series taken by Sunrise satellite, we observe an active region which is in the stage of attenuation and erupts frequently. The bright spots of several orders of magnitude are identified and counted. A sample of 2.09 脳 104 bright spots is obtained. The relationship between the frequency distribution of the basic physical quantities of solar flares and the power law and the observational effects affecting the distribution are analyzed. The main results of the data analysis are as follows: 1) the scale, area and luminous flux of the bright spots in the low color sphere are distributed from power law to power law. 2) the frequency of lifetime is power law distribution in medium time scale and exponential distribution in long time scale; The waiting time of the large scale bright spot accords with the exponential distribution. 3) the SNR of the bright spot rate decreases with the increase of the scale. The continuous generation of small scale highlights is likely to supply the coronal energy stably. 4) the frequency of the small scale highlights is lower than the power law distribution, which is influenced by the low sampling rate caused by the low temporal resolution of the observed data.
【作者单位】： 北京师范大学天文系;中国科学院太阳活动重点实验室;
【基金】：国家自然科学基金资助项目(U1231104;11533009;10921303;11221063;41174153) 中国科学院太阳活动重点实验室基金资助项目(201512)
【分类号】：P182
，
本文编号：2295177
本文链接：https://www.wllwen.com/kejilunwen/tianwen/2295177.html
