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Variations of galactic cosmic rays with heliolatitude in the outer heliosphere
Author(s) -
McDonald Frank B.,
Lal Nand
Publication year - 1986
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/gl013i008p00781
Subject(s) - heliosphere , cosmic ray , physics , ecliptic , galactic plane , astrophysics , astronomy , energetic neutral atom , cosmic cancer database , solar wind , galaxy , plasma , nuclear physics
On 1 January 1986, Voyager 1 was at a heliolatitude of 30° above the ecliptic plane at a radial distance of 25.4 AU. The galactic cosmic ray latitudinal gradients in the outer heliosphere measured at that time were found to be negative, ∼1‐2%/AU, show no strong energy dependence and are approximately half the radial gradient.