Rigidity Dependence and Time Response of Cosmic Rays to the Modulation Steps in the Rising Part of Solar Cycle 23. Cospin/ket Results |
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Authors: | C Paizis A Raviart B Heber B Falconi Ph Ferrando H Kunow R Müller-mellin |
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Institution: | 1. Dipartimento di Fisica, Università di Milano, Via Celoria 16, 20133, Milano, Italia 2. Service d'Astrophisique, C.E. Saclay, CEA, DSM/DAPNIA/, F-91191, Gif-sur-Yvette Cedex, France 3. Max-Planck-Institut für Aeronomie, Max-Planck-Str. 2, D37191, Katlenburg-Lindau, Germany 4. Istituto di Fisica Cosmica `G. Occhialini' del CNR, Via Bassini 15, 20133, Milano, Italia 5. Institut für Experimentelle und Angewandte Physik, Universit?t Kiel, 24118, Kiel, Germany
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Abstract: | Previous work on the latitudinal gradient and on the amplitude of the recurrent cosmic ray decreases, has shown that their
magnitude does not decrease monotonically with the particle rigidity, but it presents a broad maximun around 1–2 GV. We have
extended this analysis to study the behaviour of cosmic-ray particles during the modulation steps in the rising part of the
solar activity of the present Solar cycle. We found that the ‘depth’ of the modulation step decreases monotonically with increasing
rigidity and that the least energetic particles are the last to reach their minimum intensity value. We also considered in
this analysis electrons of equal rigidity to study the influence of the charge sign on the particle behaviour during the modulation
steps.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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