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Interstellar helium in interplanetary spaceThe velocity distribution function of He(+) in the solar wind at 1 AU is calculated with the assumption that the source is photoionization of a cold (T = 100 K), neutral interstellar wind. If the spiral magnetic field is noise free, the velocity distribution is diffuse and would not produce a peak at 4(E over Q) sub H in an E over Q particle spectrum. If the velocity of the interstellar wind with respect to the sun lies in the ecliptic, a large variation of the He(+) number density with respect to ecliptic longitude is expected.
Document ID
19730002087
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Feldman, W. C. (Los Alamos Scientific Lab. NM, United States)
Lange, J. J. (Wright-Patterson AFB Ohio, United States)
Scherb, F. (Wisconsin Univ. Madison, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA. Ames Res. Center Solar Wind
Subject Category
Space Sciences
Accession Number
73N10814
Funding Number(s)
CONTRACT_GRANT: NGR-50-002-162
CONTRACT_GRANT: NGL-50-002-044
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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