Earth Planets Space, Vol. 64 (No. 2), pp. 157-163, 2012
E. Kallio and R. Jarvinen
Finnish Meteorological Institute, Helsinki, Finland
(Received February 4, 2011; Revised June 26, 2011; Accepted August 11, 2011; Online published March 8, 2012)
Kinetic effects are anticipated to play a role at Mars and Venus when the escape of planetary ions is considered because of the large ion gyroradius compared with the size of the planets. In this paper we have used the HYB hybrid model to analyze the role of kinetic effects at these non-magnetized planets by varying the mass of ions in the simulation. The test runs suggest that kinetic effects should be taken into account when properties and formation of the planetary three dimensional plasma and electromagnetic field environment are studied.
Key words: Mars, Venus, solar wind, ion escape, numerical simulation.