Weakly damped Alfven waves as drivers of solar chromospheric spicules

Details Weakly damped Alfven waves as drivers of solar chromospheric spicules Weakly damped Alfven waves as drivers of solar chromospheric spicules

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.360..241h&link_type=abstract

Nature (ISSN 0028-0836), vol. 360, no. 6401, p. 241-243.

Computer Science

35

Chromosphere, Magnetohydrodynamic Waves, Spicules, Stellar Structure, Density (Mass/Volume), Magnetohydrodynamics, Momentum Transfer, Solar Magnetic Field

Scientific paper

It is suggested here that the force that propels solar chromospheric spicules against gravity may be the transfer of momentum from upward-moving Alfven waves. In the upper chromosphere the ionized plasma component is collisionally coupled to the neutral gas, but the coupling is not perfect, so that the neutral material can acquire a net velocity with respect to the ionized component. This process is known to damp the Alfven waves but it can also, as the chromosphere peters out, transfer enough momentum to local volumes to create and drive the spicules.

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