Velocity fields in the solar atmosphere /Observations/

Details Velocity fields in the solar atmosphere /Observations/ Velocity fields in the solar atmosphere /Observations/

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mmsai..48..499d&link_type=abstract

(Advanced School of Astronomy, Course on the Sun, a Tool for Stellar Physics, 6th, Erice, Italy, Aug. 8-21, 1976.) Società Astro

Astronomy and Astrophysics

Astronomy

5

Chromosphere, Convective Flow, Photosphere, Solar Atmosphere, Velocity Distribution, Acoustic Propagation, Atmospheric Heating, Solar Magnetic Field, Solar Spectra, Spectral Line Width

Scientific paper

In the present paper, oscillatory and quasi-oscillatory motions observed in the photosphere and lower chromosphere are discussed along with convective motions on different horizontal scales. The discussion covers global oscillatory modes with predominantly radial harmonic motions and a coherent wave pattern across the entire solar surface, implying global excitation; oscillatory modes with large coherent wave systems, not necessarily globally excited (five minute oscillations); locally excited short period waves (excited by the Lighthill mechanism, no trapping, rapid dissipation); and nonoscillatory velocity (and brightness) fluctuations, related to convective motions.

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