Voyager and Pioneer spacecraft measurements of cosmic ray intensities in the outer heliosphere: Toward a new paradigm for understanding the global solar modulation process 1. Minimum solar modulation (1987 and 1997)

Journal of Geophysical Research: Space Physics

Volumn 106, Issue A12, 2001, Pages 29323-29331

  Webber, W R ^a   Lockwood, J A ^b  

^a NEW MEXICO STATE UNIVERSITY   (United States)

^b UNIVERSITY OF NEW HAMPSHIRE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 39449129799     PISSN: None     EISSN: 21699402     Source Type: Journal    
DOI: 10.1029/2001ja000118     Document Type: Review

References (36)

1. Cummings, A. C., E. C. Stone, and W. R. Webber, Distance to the solar wind termination shock and the source flux of anomalous cosmic rays during 1986-1988, J. Geophys. Res., 99, 11,547, 1994.
2. Florinski, V., and J. R. Jokipii, A two-dimensional, self-consistent model of galactic cosmic rays in the heliosphere, Astrophys. J., 523, L185, 1999.
3. Gleeson, L. J., and W. I. Axford, Solar modulation of galactic cosmic rays, Astrophys. J., 154, 1011, 1968.
4. Jokipii, J. R., E. H. Levy, and W. B. Hubbard, Effects of particle drift on cosmic ray transport, I, General properties, applications to solar modulation, Astrophys. J., 213, 861, 1977.
5. Jokipii, J. R., J. Kota, and E. Merenyi, The gradient of galactic cosmic rays at the solar wind termination shock, Astrophys. J., 405, 782, 1993.
6. Jones, F. C., A. Lukasiak, V. Ptuskin, and W. Webber, The modified weighted slab technique: Models and results, Astrophys. J., 547, 264, 2001.
7. Kota, J., and J. R. Jokipii, 3-D distribution of cosmic rays in the outer heliosphere, Proc. Int. Conf. Cosmic Rays 24th, 3, 680, 1995.
8. Lockwood, J. A., and W. R. Webber, An estimate of the location of the modulation boundary for >70 MeV galactic cosmic ray using Voyager and Pioneer spacecraft data, Astrophys. J., 442, 852, 1995.
9. Lockwood, J. A., and W. R. Webber, A comparison of the rigidity dependence of the 11-year cosmic ray variation at the Earth in two solar cycles of opposite magnetic polarity, J. Geophys. Res., 101, 21,573, 1996.
10. Lockwood, J. A., W. R. Webber, and H. Debrunner, Difference in the maximum intensities and the intensity-time profiles of cosmic rays in alternate solar magnetic field polarities, J. Geophys. Res., 106, 10,635, 2001.
11. McDonald, F. B., Cosmic ray modulation in the heliosphere - A phenomenological study, Space Sci. Rev., 83, 33, 1998.
12. McDonald, F. B., H. Moraal, J. P. L. Reinecke, N. Lal, and R. E. McGuire, The cosmic radiation in the heliosphere at successive solar minimum, J. Geophys. Res., 97, 1557, 1992.
13. McDonald, F. B., N. Lal, and R. E. McGuire, Cosmic ray recovery and the solar minimum phase of solar cycle 22: An interim report, J. Geophys. Res., 103, 373, 1998.
14. McDonald, F. B., B. Heikkila, N. Lal, and E. C. Stone, The relative recovery of galactic and anomalous cosmic rays in the distant heliosphere: Evidence for modulation in the heliosheath, J. Geophys. Res., 105, 1, 2000.
15. Onto, S., et al., Precision measurement of the cosmic ray antiproton spectrum, Phys. Rev. Lett., 84, 1078, 2000.
16. Parker, E. N., The passage of energetic charged particles through interplanetary space, Planet. Space Sci., 13, 9, 1965.
17. Potgieter, M. S., The heliospheric modulation of galactic cosmic rays at solar minimum, Adv. Space Res., 19, 197, 1997.
18. Potgieter, M. S., The modulation of galactic cosmic rays in the heliosphere: Theory and models, Space Sci. Rev., 83, 147, 1998.
19. Potgieter, M. S., The heliospheric modulation of cosmic ray protons: The role of enhanced perpendicular diffusion in the polar regions of the heliosphere, Adv. Space Res., 23, 449, 1999.
20. Potgieter, M. S., and J. A. le Roux, More on a possible modulation barrier in the outer heliosphere, Adv. Space Res., 9, 121, 1989.
21. Potgieter, M. S., and H. Moraal, A drift model for the modulation of galactic cosmic rays, Astrophys. J., 294, 425, 1985.
22. Potgieter, M. S., J. A. le Roux, and R. A. Burger, Interplanetary cosmic ray radial gradients with steady state modulation models, J. Geophys. Res., 94, 2323, 1989.
23. Quenby, J. J., J. A. Lockwood, and W. R. Webber, Cosmic ray gradient measurements and modulation beyond the inner solar wind termination shock, Astrophys. J., 315, 365, 1990.
24. Reinecke, J. P. L., and M. S. Potgieter, An explanation of the differences in cosmic ray modulation at low and neutron monitor energies during consecutive solar minimum periods, J. Geophys. Res., 99, 14,761, 1994.
25. Reinecke, J. P. L., F. B. McDonald, and H. Moraal, Cosmic ray modulation in the heliosphere at successive solar minima, 5, Modulation of anomalous cosmic ray helium during the three consecutive solar minimum periods of 1977/1978, 1987, and 1997, J. Geophys. Res., 105, 27,439, 2000.
26. Sanuki, T., et al., Precise measurement of the cosmic ray proton and helium spectra with the BESS spectrometer, Astrophys. J., 545, 1135, 2000.
27. Steinolfson, R. S., and D. A. Gurnett, Distances to the termination shock and heliopause from a simulation analysis of the 1992-1993 heliospheric radio emission event, Geophys. Res. Lett., 22, 651, 1995.
28. Stephens, S. A., and R. E. Streitmatter, Cosmic ray propagation in the galaxy: Techniques and the mean matter traversal, Astrophys. J., 505, 266, 1998.
29. Van Allen, J. A., and B. A. Randall, A durable reduction of cosmic ray intensity in the outer heliosphere, J. Geophys. Res., 102, 4631, 1997.
30. Webber, W. R., The cosmic ray path length (age) distribution in the galaxy: Experimental limits on the deviation from an exponential, Astrophys. J., 402, 188, 1993.
31. Webber, W. R., and J. A. Lockwood, Characteristics of the 22-year modulation as seen by neutron monitors, J. Geophys. Res., 93, 8735, 1988.
32. Webber, W. R., and J. A. Lockwood, Intensity variations of >70 MeV cosmic rays measured by Pioneer 10, Voyager 1 and 2, and IMP in the heliosphere during the recovery period from 1992 to 1995, Geophys. Res. Lett., 22, 2669, 1995.
33. Webber, W. R., and J. A. Lockwood, Intensities of anomalous and galactic cosmic rays in the outer heliosphere near the heliospheric equator in 1987 and during the period from 1994 to 1996, J. Geophys. Res., 102, 9773, 1997.
34. Webber, W. R., and J. A. Lockwood, The inner heliosphere-outer heliosphere comparison for cosmic ray modulation, Space Sci. Rev., 83, 159, 1998.
35. Webber, W. R., J. C. Kish, J. M. Rockstroh, Y. Cassagnou, R. Legrain, A. Soutoul, O. Testard, and C. Tull, Production cross sections of fragments from beams of 400-650 MeV/nucleon 9Be, 11B, 12C, 14N, 15N, 16O, 20Ne, 22Ne, 56Fe and 58Ni nuclei interacting in a liquid hydrogen target, I, Charge changing and total cross sections, Astrophys. J., 508, 940, 1998.
36. Whans, C., J. Y. Lu, and L. F. Burlaga, The termination shock: 1979-1995 J. Geophys. Res., 104, 28,255, 1999.