The role of differential rotation in magnetic energy storage

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Energy Storage, Solar Magnetic Field, Solar Rotation, Magnetic Field Configurations, Solar Temperature, Sunspots

Scientific paper

It is suggested that the storage of magnetic energy in coronal loops is associated with the shearing of the field lines by differential rotation. A loop interconnecting two sunspots belonging to two active regions of different ages can be considered as a loop having a fixed footpoint and another moving with the relative velocity of the two sunspot-groups. With a relative velocity of 10,000 cm/sec an amount of magnetic energy of the order of 10 to the 28th power ergs may be stored. If the storage time scale is compared with dissipation time scale due to an unspecified mechanism, the situations: the stored energy is not released, negligible heating in the loop; energy is still stored but there is heating in the loop; and negligible stored magnetic energy, heating in the loop can be distinguished.

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