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Deflection of the local interstellar dust flow by solar radiation pressure (1999)

Grun, E. ; Landgraf, M. ; Gustafson, B. A. ; [et al.]

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Publication Date: 2011-08-24

Description: Interstellar dust grains intercepted by the dust detectors on the Ulysses and Galileo spacecrafts at heliocentric distances from 2 to 4 astronomical units show a deficit of grains with masses from 1 x 10(-17) to 3 x 10(-16) kilograms relative to grains intercepted outside 4 astronomical units. To divert grains out of the 2- to 4-astronomical unit region, the solar radiation pressure must be 1.4 to 1.8 times the force of solar gravity. These figures are consistent with the optical properties of spherical or elongated grains that consist of astronomical silicates or organic refractory material. Pure graphite grains with diameters of 0.2 to 0.4 micrometer experience a solar radiation pressure force as much as twice the force of solar gravity.

Keywords: Life Sciences (General)

Type: Science (ISSN 0036-8075); Volume 286; 5448; 2319-22

Format: text

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