The small-scale, quasi-periodic, disk component of solar radio radiation

Details The small-scale, quasi-periodic, disk component of solar radio radiation The small-scale, quasi-periodic, disk component of solar radio radiation

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...192..777l&link_type=abstract

Astrophysical Journal, vol. 192, Sept. 15, 1974, pt. 1, p. 777-786.

Astronomy and Astrophysics

Astrophysics

15

Chromosphere, Solar Corona, Solar Radio Bursts, Solar Temperature, Brightness Temperature, Decimeter Waves, Microwave Emission, Polarized Electromagnetic Radiation

Scientific paper

Interferometric observations of the sun at wavelengths of 3.7 and 11 cm show that small-scale, quasi-periodic radio emission is coming from the sun. The periods occur in a band of periods with a midband frequency of 3.75 mHz and a bandwidth of 2.5 mHz. The peak-to-peak fluctuations in brightness temperature, lie between 4,000 and 500,000 K. The radio emission is less than about 10% linearly or circularly polarized; the angular size of the emitting regions is of the order of 10 seconds. The radio emission originates at the base of the chromosphere-corona transition region at approximately 2200 km above the level at which the optical depth at 5000 A is unity.

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