Abstract Details
| Name: Paniveni Udayashankar Affiliation: IUCAA, Pune Conference ID: ASI2019_175 Title : Latitudinal dependence of supergranular Area and Fractal dimension Authors and Co-Authors : U.Paniveni Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : The complexity of supergranular cells is studied by using intensity patterns from Kodaikanal solar observatory. The turbulent aspect of the solar supergranulation can be studied by examining the interrelationships amongst the parameters characterizing supergranular cells namely size, horizontal flow field, lifetime, Area, Perimeter and its Fractal dimension. The Data consist of visually identified supergranular cells, from which a fractal dimension D for supergranulation is obtained according to the relation P ∝ AD/2 where A is the area and P is the perimeter of the supergranular cells. I find a fractal dimension close to about 1.3 which is consistent with that for isobars and suggests a possible turbulent origin. The findings are supportive of Kolmogorov’s theory of turbulence. A dependence of of the area of supergranular cells with respect to the Latitude is also studied and it is found that the cells are situated symmetrically about the 25◦ latitude. Fractal dimension of the supergranular cells also shows a latitudinal dependence, variation being in the range 1.7 -1.8 in the latitudinal limits of 30◦ . Since supergranular cells are essentially a manifestation of convective phenomena, they can shed light on the physi- cal conditions in the convection zone of the Sun. Moreover, supergranules play a key role in the transport and dispersal of magnetic fields as it is an important step in our quest to understand the Solar cycle. |