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Anomalous cosmic ray oxygen and neon (∼2.4 MeV/nucl) at high southern heliolatitudes
Author(s) -
Lanzerotti L. J.,
Maclennan C. G.
Publication year - 1995
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 - 10.1029/95gl03551
Subject(s) - neon , physics , cosmic ray , flux (metallurgy) , degree (music) , oxygen , range (aeronautics) , astrophysics , latitude , atomic physics , materials science , astronomy , argon , quantum mechanics , acoustics , metallurgy , composite material
We report measurements of the anomalous oxygen and neon as measured with the HI‐SCALE instrument on Ulysses at high southern heliolatitudes. Using both energy spectral features and C/O ratios, 2.0–2.8 MeV/nucl anomalous O is not distinguishable below a latitude of ∼40°S. The heliolatitude gradient is found to be +0.06±0.50% / degree for the heliolatitude range 40°S to 80°S for an assumed radial gradient of 15% per AU. For the assumption of no radial gradient, the heliolatitude gradient is 0.39±0.42%/degree. The O flux at this energy is ∼2 × 10 −8 /(cm² sr s MeV/nucl); the Ne flux is ∼5 × 10 −9 /(cm² sr s MeV/nucl).