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Research Interests:

• Global interaction between the solar wind and the interstellar medium
• Motion of the heliospheric termination shock
• Magnetohydrodynamical models of the heliospheric boundary
• Similarity solutions for synchrotron emission in a supernova blast wave
• Multi-dimensional simple waves in gasdynamics and magnetohydrodynamics
• Multi-ion solar wind

• Magnetohydrodynamic models of the interaction between the solar wind and interstellar plasma in the presence of the magnetic fields and the neutral particles
• About 60 papers published in international journals and 65 international conference papers

1. Ratkiewicz, R.,
   MHD modeling of the Heliosphere: a critical evaluation of different models
   Proceedings of the Conference: Future Perspective in Heliospheric Research: Unsolved Problems, New Missions - New Sciences, April 6 - 8, 2005, Bad Honnef, Germany, in press, 2005
2. Ratkiewicz, R., J. Grygorczuk, and L. Ben-Jaffel,
   The Termination Shock and Beyond: MHD Modeling
   AIP Conference Proceedings of the IGPP-UCR 4th Annual International Astrophysics Conference: The Physics of Collisionless Shocks, February 26-March 3, 2005, Palm Springs, California, 781, pp 294-298, 2005
3. Ratkiewicz, R., and G.M., Webb,
   Reply to Comment on ``On the Interaction of the Solar Wind with the Interstellar Medium: Field Aligned MHD Flow by R. Ratkiewicz and G.M. Webb'' by N.V. Pogorelov and T. Matsuda
   J. Geophys. Res., 109, A02111, doi:10.1029/2003JA010085, 2004
   
4. Ratkiewicz, R., J. Grygorczuk, and L. Ben-Jaffel,
   Questions about effects of interplanetary and interstellar magnetic fields on the heliospheric interface
   AIP Conference Proceedings of the IGPP-UCR 3rd Annual International Astrophysics Conference: Physics of the Outer Heliosphere, February 8-13, 2004, Riverside, California, 719, pp 93-98, 2004
5. Ratkiewicz, R., and J.F. McKenzie,
   Interstellar magnetic field effects on the termination shock, heliopause and bow shock: aligned MHD flow
   J. Geophys. Res., 108(A2), 1071, doi:10.1029/2002JA009560, 2003
6. Ratkiewicz, R., and L. Ben-Jaffel,
   Effects of Interstellar Magnetic Field B and Constant Flux of Neutral H on the Heliosphere
   J. Geophys. Res., 107, A1, pp SSH 2 1-13, 2002
7. Ratkiewicz, R., and G.M., Webb,
   On the Interaction of the Solar Wind with the Interstellar Medium: Field Aligned MHD Flow
   J. Geophys. Res., 107(A12), 1484, doi:10.1029/2001JA009163, 2002
8. Ratkiewicz, R., A. Barnes, H.-R. Muller, G.P. Zank, and G.M. Webb,
   Modeling the heliosphere: Influence of the interstellar magnetic field in the presence of LISM neutral hydrogen,
   Adv. Space Res., 29, No. 3, pp. 433-438, 2002
9. Ben-Jaffel, L., O. Puyoo, and R. Ratkiewicz,
   Far-ultraviolet echoes from the frontier between the solar wind and the local interstellar cloud,
   Astrophys. J., 533, 924-930, 2000
10. Ratkiewicz, R., A. Barnes, and J. R. Spreiter,
    Local Interstellar Medium and Modelling the Heliosphere,
    Journal Geophys. Res., 105, 25,021-25,031, 2000
11. Ratkiewicz, R., A. Barnes, G. A. Molvik, J. R. Spreiter, S. S. Stahara, M. Vinokur, and S. Venkateswaran,
    Effect of varying strength and orientation of local interstellar magnetic field on configuration of exterior heliosphere: 3D MHD simulation,
    Astron. Astrophys., 335, 363-369, 1998
12. Ratkiewicz, R.
    Constrains in modelling the heliospheric interface
    Adv. Space Res. Vol.13, No.6, 179 - 184, 1993
13. Ratkiewicz, R.
    An analytical solution for the heliopause boundary and its comparison with numerical solutions
    Astron. Astrophys. 255, No 1/2, 383 - 387, 1992
14. Fahr, H.J., S. Grzedzielski, and R. Ratkiewicz
    Magnetohydrodynamic Modeling of the 3-dimensional Heliopause Using the Newtonian Approximation
    Annales Geophysicae 6,(4), 337 - 354, 1988