Seasonal variations of the solar radiation scattered from the putative dust rings of Mars: a possible basis for photometric searches

Details Seasonal variations of the solar radiation scattered from the putative dust rings of Mars: a possible basis for photometric searches Seasonal variations of the solar radiation scattered from the putative dust rings of Mars: a possible basis for photometric searches

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...337..955b&link_type=abstract

Astronomy and Astrophysics, v.337, p.955-961 (1998)

Astronomy and Astrophysics

Astrophysics

2

Techniques: Photometric, Planets And Satellites: Deimos, Mars, Phobos

Scientific paper

The continuous bombardment of the Martian moonlets Phobos and Deimos by the interplanetary flux of micrometeoroids is believed to produce ejecta, a part of which could be introduced on long-lived circummartian orbits and form tenuous dust rings around the planet. This view is supported by a number of theoretical studies which yield a detailed space structure of the dust rings. There is, however, no direct evidence as to the existence of such rings. We assess the possibility of photometric search after the rings by modelling the field of solar radiance scattered by the putative dust region. The number density distribution of the dust grains around Mars and their size distribution are drawn from the recent theoretical models. The single-scattering albedo of the individual grains is deduced from the reflectance spectra of Phobos, gathered by the spacecraft Phobos 2. A few phenomenological scattering phase functions are taken into account. The largest calculated radiance scattered in the spectral range 0.35 microns -1.0 microns results to be of the order 10(-6} W cm({-2 sr^{-1)) .

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