Observations of photospheric faculae at the center of the solar disk

Details Observations of photospheric faculae at the center of the solar disk Observations of photospheric faculae at the center of the solar disk

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974soph...38...43m&link_type=abstract

Solar Physics, vol. 38, Sept. 1974, p. 43-57.

Physics

118

Faculae, Fine Structure, Photosphere, Solar Granulation, Ultraviolet Photography, Near Ultraviolet Radiation, Optical Filters, Solar Atmosphere, Solar Limb, Solar Magnetic Field, Ultraviolet Spectra

Scientific paper

Observations, in the near UV with very high spatial resolution, obtained with the Sacramento Peak Vacuum Tower Telescope, show that photospheric faculae are visible near the center of the disk. Faculae consist of bright point-like structures with typical dimensions of 100-200 km, and appear to be concentrated in the intergranular space. Preliminary results on measurements of size, brightness, life time, and on interaction of facular structures with granulation are presented, which support the view that faculae are identical with the recently discovered 'solar filigree'. Phenomenological arguments are discussed concerning the suggestion that facular points may represent magnetic flux concentrations in the photosphere.

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