Statistical Correlations Between Solar Microwave Bursts and Coronal Mass Ejections

Details Statistical Correlations Between Solar Microwave Bursts and Coronal Mass Ejections Statistical Correlations Between Solar Microwave Bursts and Coronal Mass Ejections

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.3711d&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #37.11; Bulletin of the American Astronomical Society, Vol. 34, p.696

Mathematics

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Scientific paper

We compare listings of coronal mass ejections (CMEs) observed by LASCO on SOHO and solar microwave bursts (SMBs) recorded by the USAF Radio Solar Telescope Network (RSTN). These data sets are the product of stable and continuous observations of the whole Sun, and provide suitable bases for robust statistical studies. In total, 3557 coronal ejections, and 1051 bursts above 50 sfu were observed from January 1996 through May 2001. Correlated events are easily distinguished by time proximity. Correlations improve as CME launch heights are projected to the solar limb, when the rms scatter in CME-SMB delay was as little as 16 min, but because coronal disturbances are only visible when they emerge from behind occulting disks, timing associations depend on the assumed source and acceleration. The probability of correlation rises with burst flux, duration or temporal complexity, and with ejection speed or width. For the 164 SMBs with intensities over 500 sfu, 70% are associated with CMEs. For the 160 CMEs which are halo-like or have speeds over 1000 km/sec (characteristics that have been associated with geoactive events), 60% and 84% are associated with SMBs, respectively.

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