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Magnetosonic Mach number effect of the position of the bow shock at Mars in comparison to Venus
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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2010 (English)In: Journal of Geophysical Research, ISSN 0148-0227, Vol. 115, A07203- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2010. Vol. 115, A07203- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-147202DOI: 10.1029/2009JA014998ISI: 000279527100004OAI: oai:DiVA.org:uu-147202DiVA: diva2:400281
Available from: 2011-02-25 Created: 2011-02-24 Last updated: 2011-02-25Bibliographically approved

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