Supergranular Fractal Dimension and Solar Rotation  

作　　者：G.M.Sowmya G.Rajani U.Paniveni R.Srikanth 

机构地区：[1]GSSS Institute of Engineering and Technology for Women,Mysuru-570016,Karmataka,India [2]PES College of Engineering,Mandya-571401,Karnataka,India [3]Bangalore University,Jnanabharathi,Bengaluru-560056,India [4]Poornaprajna Institute of Scientific Research,Devanahalli,Bangalore-562110,Kamataka,India

出　　处：《Research in Astronomy and Astrophysics》2022年第9期239-244,共6页天文和天体物理学研究（英文版）

摘　　要：We present findings from an analysis of the fractal dimension of solar supergranulation as a function of latitude,supergranular cell size and solar rotation, employing spectroheliographic data in the Ca II K line of solar cycle no.23. We find that the fractal dimension tends to decrease from about 1.37 at the equator to about 1 at 20° latitude in either hemisphere, suggesting that solar rotation rate has the effect of augmenting the irregularity of supergranular boundaries. Considering that supergranular cell size is directly correlated with fractal dimension, we conclude that the mechanism behind our observation is that solar rotation influences the cell outflow strength, and thereby cell size, with the latitude dependence of the supergranular fractal dimension being a consequence thereof.

关 键 词：Sun:chromosphere Sun:rotation Sun:magnetic fields 

分 类 号：P182[天文地球—天文学]