Modelling of 'barrier' modulation for cosmic ray protons in the outer heliosphere

Advances in Space Research

Volumn 34, Issue 1, 2004, Pages 138-143

  Langner, U W ^a   Potgieter, M S ^a   Webber, W R ^b  

^a NORTH WEST UNIVERSITY   (South Africa)

^b NEW MEXICO STATE UNIVERSITY   (United States)

Author keywords

Cosmic ray protons; Heliosheath modulation; Heliospheric cosmic ray modulation; Outer heliosphere; Termination shock

Indexed keywords

COSMIC RAYS; EXTRATERRESTRIAL ATMOSPHERES; MATHEMATICAL MODELS; MODULATION; SPACECRAFT OBSERVATORIES;

HELIOSPHERE; RADIAL INTENSITY PROFILE; TERMINATION SHOCK (TS);

PROTONS;

COSMIC RAY;

EID: 2942720422     PISSN: 02731177     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.asr.2003.02.058     Document Type: Article

References (26)

1. Burger R.A. Potgieter M.S. Heber B. Rigidity dependence of cosmic-ray proton latitudinal gradients measured by the Ulysses spacecraft: implication for the diffusion tensor J. Geophys. Res. 105 2000 27447-27455
2. Ferreira S.E.S. Potgieter M.S. Burger R.A. Heber B. Modulation effects of anisotropic perpendicular diffusion on cosmic ray electron intensities in the heliosphere J. Geophys. Res. 18 2000 18305-18314
3. Haasbroek, L.J. The transport and acceleration of charged particles in the heliosphere, Ph.D. Thesis, Potchefstroom University for C.H.E., South Africa, 1997
4. Haasbroek, L.J., Potgieter, M.S., le Roux, J.A. Some modulation effects of termination shock accelerated galactic and Jovian electrons, in: Proceedings of the 25th International Cosmic Ray Conference, vol. 2, pp. 29-32, 1997
5. Heber, B. Modulation galaktischer kosmicher Protonen und α Teilchen in der inneren drei-dimensionelen Heliosphäre, Messungen des Kiel Electron Telescopes an Bord der Raumsonde Ulysses, Ph.D. Thesis, Kiel University, Germany, 1997
6. Heber B. Dröge W. Ferrando P. Haasbroek L.J. Kunow H. Müller-Mellin R. Paizis C. Potgieter M.S. Raviart A. Wibberenz G. Spatial variation of > 40 MeV/n nuclei fluxes observed during the Ulysses rapid latitude scan Astron. Astrophys. 316 1996 538-546
7. Jokipii J.R. Kóta J. The polar heliospheric magnetic field Geophys. Res. Lett. 16 1989 1-4
8. Jokipii J.R. Kóta J. Merényi E. The gradient of galactic cosmic rays at the solar wind termination shock Astrophys. J. 405 1993 782-786
9. Kóta, J., Jokippi, J.R. 3-D distribution of cosmic rays in the outer heliosphere, in: Proceedings of the 24th International Cosmic Ray Conference, vol. 4, pp. 680-683, 1995
10. Langner, U.W., Potgieter, M.S. Effects of the solar wind termination shock on charge-sign dependent cosmic ray modulation. Adv. Space Res., this issue, 2004, doi:10.1016/j.asr.2003.01.031
11. Le Roux J.A. Potgieter M.S. Ptuskin V.S. A transport model for the diffusive acceleration and modulation of anomalous cosmic rays in the heliosphere J. Geophys. Res. 101 1996 4791-4804
12. McDonald F.B. Heikkila B. Lal N. Stone E.C. The relative recovery of galactic and anomalous cosmic rays in the distant heliosphere: evidence for modulation in the heliosheath J. Geophys. Res. 105 2000 1-8
13. McDonald F.B. Klecker B. McGuire R.E. Reames D.V. Relative recovery of galactic and anomalous cosmic rays at 1 AU: further evidence for modulation in the heliosheath J. Geophys. Res. 107 SHH 2 2002 1-9
14. Moskalenko, I.V., Strong, A.W., Ormes, J.F., Potgieter, M.S., Langner, U.W. Secondary antiprotons in cosmic rays, in: Proceedings of the 27th International Cosmic Ray Conference, pp. 1868-1871, 2001
15. Parker E.N. The passage of energetic charged particles through interplanetary space Planet. Space Sci. 13 1965 9-49
16. Potgieter M.S. The heliospheric modulation of galactic electrons: consequences of new calculations for the mean free path of electrons between 1 and 10 GeV J. Geophys. Res. 101 1996 24,411-24,422
17. Potgieter M.S. Le Roux J.A. A numerical model for a cosmic-ray modulation barrier in the outer heliosphere Astron. Astrophys. 209 1989 406-410
18. Potgieter M.S. Le Roux J.A. More on a possible modulation barrier in the outer heliosphere Adv. Space Res. 9 4 1989 121-124
19. Potgieter M.S. Burger R.A. Ferreira S.E.S. Modulation of cosmic rays in the heliosphere from solar minimum to maximum: a theoretical perspective Space Sci. Rev. 97 2001 295-307
20. Quenby J.J. Lockwood J.A. Webber W.R. Cosmic ray gradient measurements and modulation beyond the inner solar wind termination shock Astrophys. J. 365 1990 365-371
21. Reinecke, J.P.L., Moraal, H., Potgieter, M.S., McDonald, F.B., Webber, W.R. Different Crossovers? in: Proceedings of the 25th International Cosmic Ray Conference, vol. 2, pp. 49-52, 1997
22. Steenkamp, R. Shock acceleration as source of the anomalous component of cosmic rays in the heliosphere, Ph.D. Thesis, Potchefstroom University for C.H.E., Potchefstroom, 1995
23. Webber W.R. Lockwood J.A. Interplanetary radial cosmic ray gradients and their implication for a possible large modulation effect at the heliospheric boundary Astrophys. J. 317 1987 534-542
24. Webber W.R. Lockwood J.A. Voyager and Pioneer spacecraft measurements of cosmic ray intensities in the outer heliosphere: toward a new paradigm for understanding the global modulation process. 1. minimum solar modulation (1987 and 1997) J. Geophys. Res. 106 2001 29,323-29,331
25. Webber W.R. Lockwood J.A. Voyager and Pioneer spacecraft measurements of cosmic ray intensities in the outer heliosphere: toward a new paradigm for understanding the global modulation process. 2. maximum solar modulation (1990-1991) J. Geophys. Res. 106 2001 29333-29340
26. Webber W.R. Lockwood J.A. McDonald F.B. Heikkila B. Using transient decreases of cosmic rays observed at Voyagers 1 and 2 to estimate the location of the heliospheric termination shock J. Geophys. Res. 106 2001 253-260