The variation of the mean diameters of the photospheric granules near the sunspots

Details The variation of the mean diameters of the photospheric granules near the sunspots The variation of the mean diameters of the photospheric granules near the sunspots

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....78..186m&link_type=abstract

Astronomy and Astrophysics, vol. 78, no. 2, Sept. 1979, p. 186-189. Research supported by the Empirikion Foundation.

Physics

11

Size Determination, Solar Granulation, Solar Magnetic Field, Solar Physics, Sunspots, Diameters, Oculometers, Penumbras, Photosphere, Temperature Gradients, Umbras

Scientific paper

The effect of the sunspot magnetic field on the sizes of photospheric granules located in the vicinity of the penumbra (within 1-2 arcsec from the penumbra-photosphere boundary) is studied. The sizes were measured with respect to those of granules located far from the penumbra (20-50 arcsec). It is confirmed that the mean diameter of the granules is smaller in the neighbourhood of the penumbra; moreover, the size of these granules is smaller for large values of the umbral magnetic field.

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