Thermal fine structure and magnetic fields in the solar atmosphere: spicules and fibrils

Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics

Scientific paper

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Astrophysical Journal Letters, in press

Scientific paper

The relationship between observed structures in the solar atmosphere and the magnetic fields threading them is known only for the solar photosphere, even then imprecisely. We suggest that some of the fine structure in the more tenuous chromosphere and corona- specifically some populations of spicules and fibrils- correspond to warps in 2D sheet-like structures, as an alternative to conventional interpretations in terms of tube-like structures. The sheets are perhaps related to magnetic tangential discontinuities, which Parker has argued arise naturally in low-beta conditions. Some consequences of this suggestion, if it can be confirmed, are discussed.

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