Plasma motions in an emerging flux region

Details Plasma motions in an emerging flux region Plasma motions in an emerging flux region

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335..986b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 15, 1988, p. 986-995.

Astronomy and Astrophysics

Astrophysics

24

Carbon, Magnetohydrodynamic Flow, Solar Atmosphere, Ultraviolet Spectra, H Alpha Line, Line Spectra, Magnetic Field Reconnection, Plasma Turbulence

Scientific paper

Ultraviolet spectra of C IV show large nonthermal broadening in an area of emerging flux. These nonthermal motions are observed at a very early stage of reconnecting field lines. The spectra can be traced to small, rapidly changing surge or filament-like features which are seen in the center, blue, and red wing of H-alpha. They seem to have the characteristics of macrospicules or explosive events. They are precursors of the reconnection process. Plasma turbulence and/or plasma waves in the reconnecting plasma may cause the broad C IV line profiles. The activity in the transition zone precedes the formation of a bright chromospheric loop system.

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