Possible evidence for latitude-dependent cosmic-ray modulation

Details Possible evidence for latitude-dependent cosmic-ray modulation Possible evidence for latitude-dependent cosmic-ray modulation

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975icrc....3..905f&link_type=abstract

In: International Cosmic Ray Conference, 14th, Munich, West Germany, August 15-29, 1975, Conference Papers. Volume 3. (A76-26851

Astronomy and Astrophysics

Astronomy

4

Cosmic Rays, Interplanetary Magnetic Fields, Modulation, Proton Energy, Spatial Distribution, Astronomical Models, Energy Spectra, Latitude, Particle Diffusion, Steady State

Scientific paper

It is suggested that the slope of the modulated proton spectrum at low energies (less than 250 MeV) is not well accounted for in a steady state spherically symmetrical cosmic-ray modulation model and therefore may contain information on the effects of latitude variations. Under quasi-steady interplanetary conditions, slopes steeper than unity have been observed for low-energy protons. It is shown that the slope of unity or a steeper slope may be a natural consequence of having a region of enhanced modulation lying immediately above or below the solar equatorial plane and therefore may be due to the variation of interplanetary conditions with heliocentric latitude.

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