Physics
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..137..225l&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 137, Feb. 1992, p. 225-256.
Physics
17
Decimeter Waves, Neutral Sheets, Solar Corona, Solar Radio Emission, Astronomical Maps, Brightness Temperature, Chromosphere, Coronal Holes, H Alpha Line, Solar Magnetic Field
Scientific paper
Multifrequency 2D maps of the solar corona obtained during two solar rotations in 1986 are analyzed. The emission of the quiet sun, coronal holes and local sources, and its association with chromospheric and coronal features as well as with large-scale magnetic fields are discussed. Statistics are given on the source brightness temperatures, as well as distributions in longitude and latitude. The brightest sources at 164 MHz were near, but not directly above, the active regions and had characteristics of faint type I continua. The majority of the fainter sources exhibited no association with the chromospheric features seen on H-alpha synoptic charts, including filaments. The comparison with K-corona synoptic charts shows a striking correlation between the radio sources and dense coronal regions associated with the coronal neutral sheet.
Alissandrakis Constantine E.
Lantos Pierre
Rigaud D.
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