Speckle observations of solar granulation

Details Speckle observations of solar granulation Speckle observations of solar granulation

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257l...4d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 2, p. L4-L6.

Astronomy and Astrophysics

Astrophysics

47

Solar Granulation, Speckle Patterns, Stellar Convection, Stellar Structure, Computerized Simulation, Diffraction, Extreme Ultraviolet Radiation, Faculae, Image Processing, Shock Waves, Solar Atmosphere

Scientific paper

We present observations of solar granulation in a plage region near disc center obtained with the Vacuum Tower Telescope at Observatorio del Teide, Tenerife. Speckle methods were employed for data acquisition and data reduction. The images show small-scale structures of the size near the telescopic diffraction limit of 0.2 arcsec. We call attention to bright lanes at the borders between granules and intergranular areas. Conceivably, they are the intensity signature of strong upflows at the border of granules or of shocks in supersonic convection which are predicted by computer simulations of the granular phenomenon.

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