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Heliocentric distribution of cosmic dust intercepted by Pioneer 8 and 9
Author(s) -
Rhee John W.,
Berg Otto E.,
Richardson F. Frank
Publication year - 1974
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl001i008p00345
Subject(s) - physics , cosmic ray , cosmic cancer database , range (aeronautics) , astrophysics , flux (metallurgy) , cosmic dust , particle (ecology) , mass distribution , astronomy , atmospheric sciences , galaxy , geology , chemistry , materials science , oceanography , organic chemistry , composite material
More than seven years of impact data from the Pioneer 8 and 9 cosmic dust experiments indicate that the distribution of cosmic dust particles of mass 10 −16 Kg and larger is nearly independent of heliocentric distance between 0.75 AU and 1.09 AU. In this heliocentric distance range the particle concentration is ∼10 −8 per m³ and the corresponding mass density is ∼10 −24 Kg per m³. No particle flux enhancement is found at 1 AU.