The dynamics of submicron-sized dust particles lost from Phobos

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/91JA00947· OSTI ID:5224443

Horanyi, M ^[1]; Tatrallyay, M; Juhasz, A ^[2]; Luhmann, J G ^[3]

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1. Univ. of Arizona, Tucson (USA)
2. Central Research Inst. for Physics, Budapest (Hungary)
3. Univ. of California, Los Angeles (USA)

The dynamics of submicron-sized dielectric particles lost from the Martian moon Phobos are studied in connection with the possible detection of dust by the Phobos 2 spacecraft. The motion of these small dust grains is influenced not only by gravity but also by solar radiation pressure and electromagnetic forces. The plasma environment of Mars is described by applying a hybrid gasdynamic-cometary model. Some of the submicron-sized grains ejected at speeds on the order of a few tens meters per second can stay in orbit around Mars for several months forming a nonuniform and time-dependent dust halo. The lifetime of the particles depends on their size, on the actual interplanetary parameters (constant or varying with a periodicity of 28 days) and also on the orbital position of Mars at the time of ejection since there is a 24 {degree} obliquity between the orbit of Phobos and that of Mars.

• OSTI ID: 5224443
• Journal Information: Journal of Geophysical Research; (United States), Vol. 96:A7; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MARS PLANET
SATELLITES
COSMIC DUST
DETECTION
DIELECTRIC MATERIALS
ENVIRONMENT
GRAVITATION
LIFETIME
LOSSES
MASS TRANSFER
MATHEMATICAL MODELS
PARTICLE SIZE
PLASMA
RADIATION PRESSURE
SOLAR RADIATION
SPACE VEHICLES
TIME DEPENDENCE
DUSTS
MATERIALS
PLANETS
RADIATIONS
SIZE
STELLAR RADIATION
VEHICLES
640107* - Astrophysics & Cosmology- Planetary Phenomena