Sunspot observations from the SOUP instrument on Spacelab 2

Details Sunspot observations from the SOUP instrument on Spacelab 2 Sunspot observations from the SOUP instrument on Spacelab 2

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2483..133s&link_type=abstract

In NASA-Goddard Space Flight Center, Theoretical Problems in High Resolution Solar Physics, 2 p 133-141 (SEE N88-11609 02-92)

Physics

1

Magnetohydrodynamic Flow, Solar Flares, Solar Granulation, Solar Oscillations, Sunspots, Penumbras, Solar Cycles, Spacelab, Umbras, White Light Holography

Scientific paper

A series of white light images obtained by the SOUP instrument on Spacelab 2 of active region 4682 on August 5, 1985 were analyzed in the area containing sunspots. Although the umbra of the spot is underexposed, the film is well exposed in the penumbral regions. These data were digitally processed to remove noise and to separate p-mode oscillations from low velocity material motions. The results of this preliminary investigation include: (1) proper motion measurements of a radial outflow in the photospheric granulation pattern just outside the penumbra; (2) discovery of occasional bright structures (streakers) that appear to be ejected outward from the penumbra; (3) broad dark clouds moving outward in the penumbra in addition to the well known bright penumbral grains moving inward; (4) apparent extensions and contractions of penumbral filaments over the photosphere; and (5) observation of a faint bubble or loop-like structure which seems to expand from two bright penumbral filaments into the photosphere.

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