基于三維區(qū)域標記對太陽活動區(qū)低色球?qū)恿咙c的統(tǒng)計分析
發(fā)布時間：2018-10-26 08:40
【摘要】：研究太陽活動能量的統(tǒng)計分布,以探索日冕物質(zhì)加熱的物理機制.利用一種基于三維區(qū)域標記的算法,使用"日出"衛(wèi)星拍攝的低色球?qū)应?968.5單色像時間序列,觀測一個處于衰減階段且爆發(fā)頻繁的活動區(qū),對多個數(shù)量級尺度的亮點進行識別和統(tǒng)計.獲得了2.09×104個亮點樣本,分析了太陽耀斑基本物理量的頻數(shù)分布與冪律的關(guān)系,以及影響該分布的觀測效應(yīng).數(shù)據(jù)分析的主要結(jié)果如下:1)低色球?qū)恿咙c的尺度、面積、光通量服從冪律分布.2)壽命的頻數(shù)在中等時標呈冪律分布,在長時標呈指數(shù)分布;大尺度亮點的等待時間符合指數(shù)分布.3)亮點發(fā)生率的信噪比隨其尺度的增加而減小;小尺度亮點持續(xù)的產(chǎn)生有可能向日冕穩(wěn)定地提供能量.4)微小尺度亮點的頻數(shù)低于冪律分布,相當(dāng)程度上受觀測數(shù)據(jù)的低時間分辨率所造成的低采樣率影響.
[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.
【作者單位】： 北京師范大學(xué)天文系;中國科學(xué)院太陽活動重點實驗室;
【基金】：國家自然科學(xué)基金資助項目(U1231104;11533009;10921303;11221063;41174153) 中國科學(xué)院太陽活動重點實驗室基金資助項目(201512)
【分類號】：P182
，
本文編號：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.
【作者單位】： 北京師范大學(xué)天文系;中國科學(xué)院太陽活動重點實驗室;
【基金】：國家自然科學(xué)基金資助項目(U1231104;11533009;10921303;11221063;41174153) 中國科學(xué)院太陽活動重點實驗室基金資助項目(201512)
【分類號】：P182
，
本文編號：2295177
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