Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.4073t&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
1
Scientific paper
Using a great body of experimental data for the October 30, 1973 to October 26, 1999 period it is shown that the Jovian high-energy electron injection forms a "cavity" of the decreased IMF intensity. This cavity is near the IMF field lines passing through the Jupiter and acts as a "magnetic trap" where some "accumulation" of cosmic rays takes place. It is shown that at positive sign of general magnetic field of the Sun cosmic rays undergo the drift in the direction opposite to of the movement of the planets. For the negative sign the effect is reverse. A new result indicating that CR drifts are realized on the background of more general drift whose directions are also opposite to the movement of planets. It is known that the Jupiter is a powerful source of high-energy electrons (0.2÷40) MeV. On the average, the electron flux is more intense than the solar one [1]. It undergo es very large fluctuations in which the intensity can be more by a factor of 3 and preserves for a few days [2, 3]. In such events their energy density can be appreciable portion of interplanetary magnetic field (IMF) energy density in the vicinity of the Earth. At approaching to the Jupiter it essentially increases (more quickly than the square of the distance [4]) and hence the influence of the Jupiter up on IMF increases. According to [2, 3] high-energy Jovian electrons mainly propagate along field lines. The IMF field lines are of a form of the Archimedean spiral (see Fig. 1.) defined by the solar wind speed . For the October 30, 1973 to October 26, 1999 period its average values (excluding moments of a sign-change of general magnetic field of the Sun (GMFS), 1980, 1981 and 1991, 1992 [5]) are equal to ≈ 442±2 km/s. For such a speed the spiral shown in Fig. 1. has been constructed. The boundaries of its changes are marked by the dashed line when the solar wind speed varies within ± 20%. Near such IMF lines a high density of Jovian high-energy electrons are formed which will decrease the IMF modulus. It is caused by the fact that any charged particle gives rise to the magnetic moment opposite to the magnetic field
Grigoryev V. G.
Plotnikov Ya. I.
Skryabin N. G.
Timofeev V. E.
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