Indirect evidences for a gas/dust torus along the PHOBOS orbit

Details Indirect evidences for a gas/dust torus along the PHOBOS orbit Indirect evidences for a gas/dust torus along the PHOBOS orbit

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..861d&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, May 1990, p. 861-864. Research supported by the Swedish Board for Space

Physics

52

Cosmic Dust, Neutral Gases, Phobos, Planetary Orbits, Solar Wind, Toroidal Plasmas, Magnetic Disturbances, Outgassing, Planetary Rings, Plasma Density, Spacecraft Orbits, Mars, Satellites, Gases, Dust, Torus, Spacecraft Observations, Plasma, Phobos 2 Mission, Magnetic Fields, Phobos, Density, Solar Wind, Rings, Interactions, Outgassing, Ejecta, Magma Instrument, Aspera Instrument, Diagrams, Deimos, Magnetosphere, Magnetotail, Comparisons

Scientific paper

Observations from the Phobos-2 spacecraft of plasma and magnetic field effects in the solar wind near Mars suggest that a neutral gas torus/ring resides along the orbit of the Martian satellite Phobos. Strong decreases of the magnetic field strength coincident with strong plasma density increases are observed during the first elliptic transition orbits when the spacecraft approached the Phobos orbits. 'Torus effects' also have characteristics similar to the formation of a bow shock with increases of plasma density and ion temperature, and a characteristic deflection of the ion flow. This suggests a rather strong interaction between the solar wind plasma and plasma near Phobos orbit, similar to that of the solar wind with a comet.

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