Statistical characteristics of horizontal proper motions in the vicinity of pores

Verma Meetu, Leibniz-Institut fur Astrophysik, Potsdam
Denker Carsten, cdenker@aip.de, Leibniz-Institut fur Astrophysik, Potsdam, Germany

Abstract
Movement and coalescence of magnetic elements could explain evolution and growth of pores. There have been numerous studies focusing on flow fields in and around individual pores. Here, we present a systematic study of the statistical properties of such flows. Hinode/SOT data offer an opportunity for this type of research, because of the uniform data quality and absence of seeing so that pores can directly be compared in different environments and at various stages of their evolution. We analyzed about 220 time-series of G-band images using Local Correlation Tracking (LCT) techniques. The thus computed flow maps make up a database, which covers various scenes on solar surface. We compared two pores with different backgrounds: one isolated pore in active chromospheric network and other is the residual pore, i.e., end product of a decaying sunspot. We found noticeable differences in various physical quantities of flow fields for both pores. We also present preliminary statistical parameters for a large subset of the database, which includes information, among others, about the evolutionary stage (young, mature, or decaying) of a pore, the complexity of the surrounding magnetic field, and the proximity to sunspots or cluster of G-band bright points.