Weakly damped Alfvén waves as drivers of solar chromospheric spicules | Semantic Scholar
@article{Haerendel1992WeaklyDA,
title={Weakly damped Alfv{\'e}n waves as drivers of solar chromospheric spicules},
author={Gerhard Haerendel},
journal={Nature},
year={1992},
volume={360},
pages={241-243},
url={https://api.semanticscholar.org/CorpusID:44454309}
}THE solar chromosphere, which separates the photosphere (temperature T ≈ 6,400 K) from the hotter solar corona (T ≈ 106 K), has a very inhomogeneous structure which is strongly influenced by the magnetic field. In the lowest 2,000 km of chromospheric altitude, the density falls by six orders of magnitude, and the temperature stays below 8,000 K. Above this altitude the transition to the corona is extremely irregular. It is dominated by spicules: thin (< 1,000 km) protrusions of cool…