Interaction of the solar wind with the planet Mars - PHOBOS 2 magnetic field observations

Details Interaction of the solar wind with the planet Mars - PHOBOS 2 magnetic field observations Interaction of the solar wind with the planet Mars - PHOBOS 2 magnetic field observations

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39...75r&link_type=abstract

(Colloquium on Phobos-Mars Mission, Paris, France, Oct. 23-27, 1989, Proceedings. A91-29558 11-91) Planetary and Space Science (

Astronomy and Astrophysics

Astronomy

23

Computerized Simulation, Mars Surface, Phobos, Planetary Magnetic Fields, Solar Wind, Mars Probes, Planetary Magnetospheres, Spaceborne Astronomy, Mars, Spacecraft Observations, Phobos 2 Mission, Solar Wind, Interaction, Magnetic Field, Altitude, Magnetotail, Bow Shock, Turbulence, Distance, Magnetosheath, Magma Instrument, Fgmm Instrument, Boundaries, Magnitude, Magnetopause

Scientific paper

The Phobos mission provided data down to 850 km above the dayside surface of Mars and many measurements in the wake at a distance of about 9600 km from the center of Mars. Two distinct boundaries are reported including the bow shock and the planetopause. The planetopause is characterized by a drop of magnetic turbulence and separates the region dominated by ions of Martian origin from the region dominated by solar wind. A computer model is used in conjunction with observed data to deduce a subsolar height of the planetopause of about 400 km above the surface and a bow shock stand off distance of approximately 1.5 Mars radii. It is noted that during the circular orbit phase the location of the shock appeared to be variable and using average solar wind conditions a mean terminator radius of about 2.6 RM is found. It is suggested that the sensitivity of the tail lobes to the IMF direction at a distance of 2.8 Mars radii suggests an induced character of the tail at least outside that distance.

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