jgra20390.pdf (604.47 kB)
Download file

Magnetosonic Mach number effect of the position of the bow shock at Mars in comparison to Venus

Download (604.47 kB)
journal contribution
posted on 24.10.2012, 09:06 by N. J. T. Edberg, M. Lester, S. W. H. Cowley, DA. Brain, M. Fraenz, S. Barabash
[1] We study the effect of the magnetosonic Mach number on the position of the bow shock (BS) at Mars. The magnetosonic Mach number is calculated from solar wind data obtained by the ACE satellite upstream of Earth and extrapolated to Mars during two intervals, starting in 2005 and 2007, when Mars and Earth were close to opposition. An increased Mach number is observed to cause the Martian BS to move to lower altitudes and the variation in the terminator altitude is proportional to the Mach number change. When the Mach number is lowered, the BS flares more. We also compare our results to previous studies at Venus. The variation in BS altitude with magnetosonic Mach number is found to be very similar to the variation of the Venusian BS, which has previously been shown to decrease linearly in altitude with increasing Mach number.

History

Citation

Journal of Geophysical Research-SPACE PHYSICS, 2010, 115

Version

VoR (Version of Record)

Published in

Journal of Geophysical Research-SPACE PHYSICS

Publisher

American Geophysical Union (AGU); Wiley

issn

0148-0227

Copyright date

2010

Available date

24/10/2012

Publisher version

http://onlinelibrary.wiley.com/doi/10.1029/2009JA014998/abstract

Language

English