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Research Paper | Physics | Nigeria | Volume 12 Issue 5, May 2023
The Effect of Compton-Getting Correction on Galactic Cosmic Rays Anisotropy
G. Adagba [4] | J. Augustine | B.G Ayantunji
Abstract: The relative motion of the solar system through the local plasma frame can introduce a dipole anisotropy also known as Compton-Getting (CG) effect. This effect can alter galactic cosmic ray (GCR) anisotropy data if not corrected. Here, CG anisotropy was modeled using a theoretical approach while data from the research team at Cosmic Rays Observatory in (IZMIRAN Moscow), Russia was used to test the mini model. Our results showed that GCR anisotropy modeled with CG demonstrated a strong spurious anisotropy in Geocentric Solar Ecliptic (GSE) coordinate rotating with the Earth particularly, the equatorial anisotropy. The result showed that, the decrease is mostly affected in the x and y direction because their amplitude was affected most. And the recovery time was longer in the x axis after the decrease. The amplitude of the uncorrected GCR anisotropies were higher and after CG was removed, the amplitude became lower and smoother. Our results also showed that GCR anisotropy modeled with CG inclusive showed higher magnitudes in the GSE coordinate rotating with the Earth particularly, the equatorial anisotropy. The results with CG correction do not exhibit this feature. Our conclusion is that GCR anisotropy data should be corrected for CG effects before using in analysis.
Keywords: cosmic rays, Compton-Getting, anisotropy, solar system, sun
Edition: Volume 12 Issue 5, May 2023,
Pages: 1517 - 1519