本文選題：太陽(yáng) + 光球　； 參考：《天文學(xué)報(bào)》2015年05期

【摘要】：光球亮點(diǎn)是位于米粒暗徑中的小尺度發(fā)亮結(jié)構(gòu),普遍認(rèn)為它是千高斯磁流管的足點(diǎn).采用云南澄江撫仙湖1 m新真空太陽(yáng)望遠(yuǎn)鏡(New Vacuum Solar Telescope,NVST)在Ti O波段的NOAA 11598觀(guān)測(cè)數(shù)據(jù),研究黑子周?chē)馇蛄咙c(diǎn)的特性變化.首先識(shí)別黑子,通過(guò)形態(tài)學(xué)膨脹技術(shù)把黑子外圍劃分為4個(gè)環(huán)形區(qū)域,然后采用一個(gè)結(jié)合了拉普拉斯與形態(tài)學(xué)技術(shù)的自動(dòng)算法識(shí)別亮點(diǎn),并在三維時(shí)空立方體中跟蹤亮點(diǎn)的演化,最后研究了4個(gè)環(huán)形區(qū)域中亮點(diǎn)的特性變化,包括密度、強(qiáng)度、面積、形狀和速度.統(tǒng)計(jì)結(jié)果和假設(shè)檢驗(yàn)均表明位于黑子外圍不同區(qū)域的光球亮點(diǎn)的密度、等效直徑和速度明顯受黑子強(qiáng)磁場(chǎng)的影響,其峰值不在最靠近黑子的區(qū)域,而是位于第2個(gè)區(qū)域,并隨著遠(yuǎn)離黑子,其密度減小,直徑減小而速度增加;最大強(qiáng)度比總體呈現(xiàn)出逐漸減小的趨勢(shì);而形狀基本沒(méi)有變化,與所處的區(qū)域無(wú)關(guān).
[Abstract]:The bright spot of the optical sphere is a small-scale luminous structure located in the dark diameter of the grain, which is generally considered to be the foot point of the magnetic flux tube of Thousand Gao Si. In this paper, the NOAA 11598 data of 1 m Vacuum Solar Telescope1 from Fuxian Lake, Chengjiang, Yunnan Province, are used to study the characteristics of the bright spots around sunspots. First of all, the sunspot is identified, the periphery of the sunspot is divided into four ring regions by morphological expansion technique, and then an automatic algorithm combining Laplace and morphology is used to identify the bright spot. The evolution of bright spots is followed in three-dimensional spatio-temporal cubes. Finally, the characteristics of bright spots in four annular regions, including density, intensity, area, shape and velocity, are studied. The statistical results and hypothesis tests show that the density, equivalent diameter and velocity of the bright spots located in different regions around the sunspot are obviously affected by the strong magnetic field of the sunspot, and the peak value is not in the region closest to the sunspot, but in the second region. Along with the distance away from the sunspot, the density decreases, the diameter decreases and the velocity increases; the maximum intensity ratio shows a decreasing trend in general; and the shape has no change and is independent of the region in which it is located.
【作者單位】： 昆明理工大學(xué)信息工程與自動(dòng)化學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(11303011,11263004,11463003,11163004,U1231205)資助
【分類(lèi)號(hào)】：P182.41

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