Modulation over a 22-year cosmic ray cycle: On the tilt angles of the heliospheric current sheet

Advances in Space Research

Volumn 32, Issue 4, 2003, Pages 657-662

  Ferreira, S E S ^a   Potgieter, M S ^a  

^a NORTH WEST UNIVERSITY   (South Africa)

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTATIONAL METHODS; COSMIC RAYS; MATHEMATICAL MODELS; MODULATION;

COSMIC RAY (CR) MODULATION;

SPACE RESEARCH;

COSMIC RAY; SOLAR ACTIVITY; SOLAR WIND;

EID: 0242541274     PISSN: 02731177     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0273-1177(03)00360-0     Document Type: Article

References (27)

1. Burger, R. A. and M. S. Potgieter, The effect of large current sheet tilt angles in numerical modulation models: a theoretical assessment, Proc. 26th Int. Cos. Ray Conf, 7, 13-16, 1999.
2. Burger, R. A., M. S. Potgieter, and B. Heber, Rigidity dependence of cosmic-ray proton latitudinal gradients measured by the Ulysses spacecraft: Implications for the diffusion tensor, J. Geophys. Res., 105, 27447-27544, 2000.
3. Burlaga, L. F., F. B. McDonald, and N. F. Ness, Cosmic ray modulation and the distant heliospheric magnetic field: Voyager 1 and 2 observations from 1986 to 1989, J. Geophys. Res., 98, 1-11, 1993.
4. Clem, J. M., D. P. Clements, J. Esposito, P. Evenson, D. Huber, et al., Solar modulation of cosmic electrons, Astrophys. J., 464, 507-515, 1996.
5. Clem, J. M., P. Evenson, and B. Heber, Cosmic electron gradients in the inner heliosphere, Geophys. Res Lett., in press, 2002.
6. Evenson, P., Cosmic ray electrons, Space Sci. Rev., 83, 63-73, 1998.
7. Ferreira, S. E. S., The heliospheric transport of galactic cosmic rays and jovian electrons, Ph.D. thesis, Potchefstroom University for CHE, South Africa, 2002
8. Ferreira, S. E. S., M. S. Potgieter, R. A. Burger, and B. Heber, Modulation effects of anisotropic perpendicular diffusion on CR electron intensities in the heliosphere, J. Geophys. Res., 105, 18305-18314, 2000.
9. Ferreira, S. E. S., M. S. Potgieter, R. A. Burger, B. Heber and H. Fichtner, Modulation of jovian and galactic electrons in the heliosphere 1. Latitudinal transport of a few-MeV electrons, J. Geophys. Res., 106, 24979-24988, 2001.
10. Giacalone, J., and J. R. Jokipii, The transport of cosmic rays across a turbulent magnetic field, Astrophys. J., 520, 204-214, 1999.
11. Hattingh, M., and R. A. Burger, A new simulated wavy neutral sheet drift model, Adv. Space Res., 13(9), 213-216, 1995.
12. Heber, B., P. Ferrando, A. Raviart, C. Paizis, R. Müller-Mellin, et al., Charge-sign dependent modulation along the Ulysses trajectory: COSPIN/KET observations, Proc. 25th Inter. Cosmic Ray Conf., 10, 3897-3400, 2001.
13. Heber, B., G. Wibberenz, M. S. Potgieter, et al., Ulysses COSPIN/KET observations: Charge-sign dependence and spatial gradients during the 1990-2000 A > 0 solar magnetic cycle, J. Geophys. Res., 107, SSH2-1, 2002.
14. Hoeksema, J. T., Large scale structure of the heliospheric magnetic field; 1976-1991, in Solar Wind Seven, edited by E. Marsch and R. Schwenn, p191-196, Pergamon, Oxford, 1992.
15. Jokipii, J. R., and J. Kóta, The polar heliospheric magnetic field, Geophys. Res. Lett., 16, 1-4, 1989.
16. Kóta, J. and J. R. Jokipii, Modelling of 3-D corotating cosmic ray structures in the heliosphere, Space Sci. Rev., 83, 137-145, 1998.
17. Le Roux, J. A., and M. S. Potgieter, A time-dependent drift model for the long-term modulation of cosmic rays with special reference to asymmetries with respect to the solar minimum of 1987, Astrophys. J., 361, 275-282, 1990.
18. Le Roux, J. A., and M. S. Potgieter, The simulated features of heliospheric CR modulation with a time-dependent drift model: IV, The role of the heliospheric neutral sheet deformation, Astrophys. J., 397, 686-693, 1992.
19. Le Roux, J. A., and M. S. Potgieter, The simulation of complete 11 and 22 year modulation cycles for CRs in the heliosphere using a drift model with global merged interaction regions, Astrophys. J., 442, 847-851, 1995.
20. Parker, E. N., The passage of energetic charged particles through interplanetary space, Planet. Space Sci., 13, 9-14, 1965.
21. Potgieter, M. S., The heliospheric modulation of galactic cosmic rays at solar minimum, Adv. Space Res., 19, 883-892, 1997.
22. Potgieter, M. S., The heliospheric modulation of cosmic ray protons: Role of enhanced perpendicular diffusion during periods of minimum solar modulation, J. Geophys. Res., 105, 18295-18303, 2000.
23. Potgieter, M. S., and S. E. S. Ferreira, Modulation of cosmic rays in the heliosphere over 11 and 22 year cycles: A modeling perspective, Adv. Space Res., 27(3), 481-492, 2001.
24. Potgieter, M. S., R. A. Burger, and S. E. S. Ferreira, Modulation of cosmic rays in the heliosphere from solar minimum to maximum: a theoretical perspective, Space Sci. Rev., 97, 295-307, 2001.
25. Potgieter, M. S., L. J. Haasbroek, B. Heber, and P. Ferrando, The modelling of the latitude dependence of cosmic ray protons and electrons in the inner heliosphere, Adv. Space Res., 19(6), 901-920, 1997.
26. Reinecke, J. P. L., H. Moraal, and F. B. McDonald, The cosmic radiation in the heliosphere at successive solar minima 3. Steady-state drift solutions of the transport equation, J. Geophys. Res., 101, 21581-21588, 1996.
27. Usoskin, I. G., H. Kananen, K. Marsula, P. Tanskanen and G. A. Kovaltsov, Correlative study of solar activity and cosmic ray intensity, J. Geophys. Res., 103, 9567-9574, 1998.