Coronal mass ejections and streamers associated with the new cycle active regions at solar minimum

Details Coronal mass ejections and streamers associated with the new cycle active regions at solar minimum Coronal mass ejections and streamers associated with the new cycle active regions at solar minimum

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...378..398k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 378, Sept. 1, 1991, p. 398-406.

Other

25

Particle Emission, Solar Activity, Solar Corona, Solar Cycles, Stellar Mass Ejection, Noaa Satellites, Photosphere, Solar Magnetic Field, Sunspots

Scientific paper

Data from the coronagraph/polarimeter on the SMM spacecraft are used to examine the coronal streamers and coronal mass ejections (CMEs) associated with the appearance of the high-latitude, new-cycle active regions at the beginning of solar cycle 22 in 1986 and 1987. Short-lived active regions, those lasting less than a disk passage, were not associated with streamers or CMEs. CMEs were generally associated with a high-latitude region only when another strong active region lay within about 30 deg of the longitude of the high-latitude region. The CMEs appeared to arise from magnetic connections between the high-latitude regions and low-latitude, old-cycle regions or between the high-latitude regions of opposite hemisphere. The development of streamers over the active regions appeared to be independent of the occurrence of CMEs. In some cases streamers formed over active regions with which no CMEs were observed, and in other cases CMEs were associated with regions with no overlying streamers. Streamers were also observed to survive CMEs associated with the underlying active regions.

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