Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...61..163a&link_type=abstract
Icarus (ISSN 0019-1035), vol. 61, Jan. 1985, p. 163-170. NASA-supported research.
Astronomy and Astrophysics
Astronomy
1
Hydrogen, Interplanetary Medium, Lyman Alpha Radiation, Neutral Gases, Polarization Characteristics, Astronomical Coordinates, Astronomical Maps, Linear Polarization, Prediction Analysis Techniques, Solar Wind
Scientific paper
The authors investigate how the uncertainties in current model calculations could be reduced through the use of polarization measurements made from interplanetary spacecraft. In particular they inquire how a mapping of the degree of linear polarization made from a spacecraft at various locations in the Solar System can improve our knowledge of the interstellar wind parameters, number density, temperature, and velocity. The sky distribution of intensity and polarization has been calculated using a variety of models for the neutral hydrogen. It is found that the polarization distribution over the sky is quite different from that of the intensity distribution. It is also shown that the maximum degree of polarization of the Lyman-α line increases with heliocentric distance of the spacecraft, varying from 0 up to ≡18% at 20 AU.
Ajello Joseph M.
Thomas Gareth E.
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