Long term resdual modulation of galactic cosmic rays: more data

Details Long term resdual modulation of galactic cosmic rays: more data Long term resdual modulation of galactic cosmic rays: more data

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3834a&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

1

Scientific paper

Galactic cosmic ray (GCR) intensity data have been analyzed by Stozhkov et al (2000), and by Ahluwalia (2000) for 4 consecutive solar activity minima for the period 1963 to 1998. Data obtained with a variety of detectors located at the global sites as well as the balloon altitudes are used in both analyses. A systematic decrease is observed in all data sets, near solar minimum epochs for the 1965 to 1987 period. The median rigidity of response (Rm) for these detectors to GCR spectrum lies in the range: 1 GV < Rm < 67 GV. The observed decrease (residual GCR modulation) is ascribed to a supernova explosion in the near interstellar medium by Stozhkov et al. This is disputed by Ahluwalia's analysis. He ascribes it to the long-term modulation of GCR flux within the heliosphere by the solar wind. Additional data (not presented before), obtained on board the IMP spacecrafts, are presented in support of the heliosphereic modulation hypothesis.

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