Search for Gas/Dust Escape From Phobos and Deimos Using MGS MAG/ER Observations

Details Search for Gas/Dust Escape From Phobos and Deimos Using MGS MAG/ER Observations Search for Gas/Dust Escape From Phobos and Deimos Using MGS MAG/ER Observations

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa13a1121s&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SA13A-1121

Physics

5465 Rings And Dust, 6025 Interactions With Solar Wind Plasma And Fields, 6230 Martian Satellites, 2154 Planetary Bow Shocks, 2159 Plasma Waves And Turbulence

Scientific paper

More than 600 elliptical aerobraking and science phasing orbits made by Mars Global Surveyor (MGS) early in the mission provide unprecedented coverage of the solar wind in the vicinity of the Martian moons Phobos and Deimos, as well as their orbits. We have performed a comprehensive survey of electron and magnetic field perturbations in the solar wind to search for possible signatures of solar wind interaction with dust or gas escaping from the moons. Contrary to previous reports based on PHOBOS-2 spacecraft data we find that the solar wind perturbations are distributed quite equally over the spatial area covered by MGS and there are no clustering of perturbations near Phobos, Deimos, their orbits, or their wakes. The solar wind perturbations are most likely caused by the multiple bow shock crossings, foreshock turbulence, and hot flow anomalies. We conclude that the density of the gas/dust escaping the moons must be too low to induce detectable electron and magnetic field perturbations in the solar wind. In essence we do not find any evidence for outgassing/dust escape from the Martian moons.

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