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Directivity of non-thermal X-ray emission from solar flares (1976)

Kovrizhnikh, O. M. ; Savenko, I. A. ; Chupova, L. M.

Springer

Solar physics 50 (1976), S. 447-456

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ISSN: 1573-093X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract An attempt has been made in the present work to reveal the directivity of solar non-thermal X-ray emission using the data obtained from the Prognoz and Explorer satellites. The frequency of occurrence of X-ray bursts and the mean intensities of the emission are studied as a function of distance from the central meridian. The most complete statistics have been obtained for the 4–24 keV X-ray bursts for the period 1970–1973. The X-ray burst frequency of occurrence normalized to the corresponding Hα flare frequency increases towards the solar limb. During the studied period this trend is more pronounced to the east than to the west. Distributions of the mean intensities of X-ray bursts are very similar to those of the frequency of occurrence of X-ray bursts; the effect is more noticeable for the low intensity bursts. The effect of the east-west asymmetry for Hα flares has been found to vary in magnitude and direction during the 20th solar activity cycle.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00155306

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