Far-infrared continuum observations of solar faculae

Details Far-infrared continuum observations of solar faculae Far-infrared continuum observations of solar faculae

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..348l&link_type=abstract

Astrophysical Journal, Part 1, vol. 247, July 1, 1981, p. 348-353.

Physics

7

Faculae, Far Infrared Radiation, Infrared Spectra, Solar Granulation, Astronomical Photometry, Photosphere, Solar Atmosphere, Solar Physics

Scientific paper

New observations of photospheric faculae in the far-infrared (10-25 micron wavelength) continuum are presented. Two-beam linear scans with 10 arcsec and 20 arcsec resolution were used to compile statistics on infrared continuum emission from faculae surrounding sunspots. The infrared facular excess above the quiet sun continuum is found to be much smaller than that predicted by plane parallel photospheric models constructed from Mg II h and k line wing observations. It is proposed that the discrepancy results from unresolved granular structure in which the facular granules occupy only about 0.1 of the resolved surface area in the low photosphere.

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