Accession Number : AD0697772

Title :   A STATISTICAL ANALYSIS OF FLARE EVENTS AND ITS IMPLICATIONS CONCERNING THE SUN'S INTERNAL ROTATION,

Corporate Author : STANFORD UNIV CALIF INST FOR PLASMA RESEARCH

Personal Author(s) : Van Hoven,Gerard ; Sturrock,P. A. ; Switzer,Paul

Report Date : NOV 1968

Pagination or Media Count : 21

Abstract : A series of 1119 flares of importance > or = 2, distributed over 6 1/2 years of solar cycle 19, has been spectrum-analyzed in longitude by a statistical procedure based on the maximum-likelihood principle. Modulation of order 25 percent is found at two independent rotation rates with synodic periods 28.80 and 31.63 days. It is proposed that these spectral components in the flare distribution are due to, and provide measurements of, the rigid-body rotation of the radiative core and of the bulk of the convective zone, respectively. In addition to their implication concerning the solar interior, these results are relevant to flare prediction. (Author)

Descriptors :   (*SOLAR FLARES, STATISTICAL ANALYSIS), ROTATION, MATHEMATICAL PREDICTION, PROBABILITY DENSITY FUNCTIONS, PERIODIC VARIATIONS

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE