Correlation of the Solar Activity Indicators Sunspot, F(10, 7), and X-Ray Radiation

Details Correlation of the Solar Activity Indicators Sunspot, F(10, 7), and X-Ray Radiation Correlation of the Solar Activity Indicators Sunspot, F(10, 7), and X-Ray Radiation

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001lapa....3...73j&link_type=abstract

Warta LAPAN, vol. 3, p. 73

Physics

Correlation Coefficients, Solar Activity, Sunspots, X Rays, Radiant Flux Density, Sun

Scientific paper

There are close correlation between three parameters of solar activities : sunspot number (R), flux 10,7 cm. (F10,7) and the intensity of Soft X-ray radiation (ISXR.). The correlation between them are F10,7 = 0,96 R + 57,54, ISXR = 3,5x10-7 R(sup 1,63), and ISXR= 1,25 x 10-12(F10,7(sup 3,05), respectively, with correlation coefficient more than 95%. The radiation of flux 10.7 cm and Soft X-ray always exists, without the emergencies of sunspot (R=O). Based on these investigations, the authors propose that the sun is active if the value of R, F10,7, and ISXR are R greater than 100, F10,7 greater than 180 sfu, dan SXR greater than 10-6 Watt per square meters respectively.

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