Conway, AJ; Matthews, SA; (2003) The apparent longitude distribution of solar flares. ASTRON ASTROPHYS , 401 (3) 1151 - 1157. 10.1051/0004-6361:20030216.

Preview

PDF 9748.pdf Download (168kB)

Abstract

The distribution of solar flares in solar disk longitude averaged over many solar rotations must be uniform. However, heliographic longitude distributions constructed from observed flare locations are obviously not uniform. In the wavelength ranges we consider (hard and soft X-rays and Halpha), where the emission is presumed to be nearly isotropic, we find a wavelength-dependent bias such that fewer flares than expected occur near the limb. We can explain this bias in terms of the method of locating the flare (from Halpha) and the flare magnitude and duration. This work has implications that are relevant to measuring directivity in emission processes and also the possibility of identifying limb flares by statistical means in catalogues rather than by the time-consuming inspection of images.

Download activity - last month

Export as CSVJSONXML

Download activity - last 12 months

Export as CSVJSONXML

Downloads by country - last 12 months

Export as CSVXMLJSON

Archive Staff Only

View Item