Speckle observations of abnormal solar granulation

Details Speckle observations of abnormal solar granulation Speckle observations of abnormal solar granulation

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264l..24d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 2, p. L24-L26.

Astronomy and Astrophysics

Astrophysics

43

Solar Granulation, Speckle Patterns, Sunspots, Magnetic Flux, Solar Magnetic Field, Solar Spectra

Scientific paper

We present observations of solar granulation obtained with the Vacuum Tower Telescope at Observatorio del Teide, Tenerife. Speckle methods were applied to restore images of abnormal granulation in the vicinity of a sunspot near disk center. These reconstructions show nests and chains of bright 'points', whose diameters and spatial distances are close to the diffraction limit of the telescope (about 0.2 arcsec). The 'points' are not always circular in shape but also elongated. If these features are identified with the footpoints of small-scale magnetic fluxtubes, their fast temporal evolution within one or two minutes and their horizontal motion with velocities up to 2 - 3 km/sec will influence the understanding of fluxtube dynamics.

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