Solar limb brightening at 1.3 millimeters

Details Solar limb brightening at 1.3 millimeters Solar limb brightening at 1.3 millimeters

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..340h&link_type=abstract

Astrophysical Journal, Part 1, vol. 244, Feb. 15, 1981, p. 340-344.

Astronomy and Astrophysics

Astronomy

34

Brightness Temperature, Chromosphere, Radio Astronomy, Solar Atmosphere, Solar Limb, Solar Radio Emission, Astronomical Models, Limb Darkening, Millimeter Waves, Solar Corona

Scientific paper

Radial scans across the solar disk with the 29 arcsec half-power beam width of the Owens Valley Radio Observatory 10-m telescope provide evidence for 10 + or - 5% limb brightening in the mean quiet sun at 1.3 mm. This result is consistent with a spherically symmetric chromosphere. The solar radius at 1.3 mm was 8.6 + or - 1 arcsec larger than the optical radius, which is consistent with the expected effect of a forest of optically thick spicules viewed at the extreme limb.

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