The Pattern of Moving Magnetic Inhomogeneities in and Around Sunspots

Author: Ravindra B.   Venkatakrishnan P.   Kumar Brajesh  

Publisher: Springer Publishing Company

ISSN: 0038-0938

Source: Solar Physics, Vol.225, Iss.1, 2004-11, pp. : 47-58

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

High-resolution MDI magnetograms are used to study the pattern of moving magnetic inhomogeneities in sunspots. We examine the inward and outward moving features in sunspots. The velocity of these features is small in the umbra while it is about 0.5 km s−1 in the outer penumbra. The inward and outward moving features may be the possible origin for the long-term fluctuations of magnetic field strength in sunspots.