Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8424521n&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
5
Astronomical Catalogs, H Alpha Line, Light (Visible Radiation), Solar Flares, Solar Radio Emission, Solar X-Rays, Magnetic Fields, Northern Hemisphere, Penumbras, Radio Frequencies, Southern Hemisphere, Sunspots
Scientific paper
This catalog of 57 solar white-light flares reported between 1859 and 1982 includes H-alpha, soft X-ray, and radio emissions associated with the white-light flares. The following are among the conclusions resulting from statistical examination of the listed flares and the active regions in which they occurred: (1) The active regions that produce white-light flares tend to have the following characteristics: (a) magnetic class = Delta; (b) classification of the penumbra of the largest spot = K; and (c) sunspot group area > 500 millionths of the solar hemisphere. (2) Northern Hemisphere white-light flare activity begins abruptly about 1 or 2 years before solar maximum, and declines slowly thereafter. Southern hemisphere white-light flare activity follows the same pattern, but begins approximately 1 year after solar maximum. (3) White light flares have a mean latitude of 13 + or - 2 deg in the Southern Hemisphere but a mean latitude of 18 + or - 1 deg in the Northern Hemisphere. (4) White-light flares exhibit a north-south asymmetry with 70% more events having been observed in the Northern Hemisphere as compared to the southern (the current solar cycle is a possible exception with southern hemisphere activity dominating) as of December 1982. (5) There is no compelling evidence of preferred solar longitudes for white-light flare active regions. Southern Hemisphere activity during the current cycle is a possible exception.
Cliver Edward W.
Neidig Donald F.
No associations
LandOfFree
A catalog of solar white-light flares, including their statistical properties and associated emissions, 1859 - 1982 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A catalog of solar white-light flares, including their statistical properties and associated emissions, 1859 - 1982, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A catalog of solar white-light flares, including their statistical properties and associated emissions, 1859 - 1982 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1594624