The thermal emission of the dust corona, during the eclipse of June 30, 1973. II - Photometric and spectral observations

Details The thermal emission of the dust corona, during the eclipse of June 30, 1973. II - Photometric and spectral observations The thermal emission of the dust corona, during the eclipse of June 30, 1973. II - Photometric and spectral observations

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974a%26a....37...81l&link_type=abstract

Astronomy and Astrophysics, vol. 37, no. 1, Dec. 1974, p. 81-86. Research supported by the Delegation Generale a la Recherche S

Astronomy and Astrophysics

Astrophysics

20

Infrared Spectroscopy, Interplanetary Dust, Solar Corona, Solar Eclipses, Thermal Emission, Airborne Equipment, Luminous Intensity, Near Infrared Radiation, Solar Atmosphere, Solar Limb, Spectrum Analysis

Scientific paper

Observations of the F-corona have been made in the 10-micron region of the infrared during the eclipse of June 30, 1973. Use of the supersonic aircraft 'Concorde 001' permitted 74 min of observation during totality and greatly reduced problems due to sky noise. The plane of the ecliptic was scanned over heliocentric distances of from 3 to 19 solar radii off the east limb. Bright features previously observed at shorter wavelengths, notably emission at 4 solar radii are evident on the 10-micron scans, strongly indicating that the radiation is due to thermal emission by dust. The specific intensity in the 4-solar-radius feature is 5 microwatts per sq cm per sterad per micron higher than the intensity 22 arcmin above the ecliptic. Spectra were taken at one region in the ecliptic and tentatively attributed to silicate-type material.

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