Solar and Heliospheric Processes from Solar Wind Composition Measurements

Details Solar and Heliospheric Processes from Solar Wind Composition Measurements Solar and Heliospheric Processes from Solar Wind Composition Measurements

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994rspta.349..213g&link_type=abstract

Philosophical Transactions: Physical Sciences and Engineering, Volume 349, Issue 1690, pp. 213-226

Astronomy and Astrophysics

Astrophysics

25

Scientific paper

Composition measurements in the solar wind provide important information for solar system science and astrophysics. We show in this report how ion composition data are used to investigate chromospheric and coronal processes. Isotopic abundances in the Sun can best be derived from solar wind measurements. 3He/4He is an isotopic ratio with far-reaching implications. It allows us to determine the deuterium abundance in the proto-solar nebula, which in turn leads to an estimate of deuterium production in the early universe. The interstellar gas is the second most important source of heliospheric ions. Atomic abundances in the local interstellar gas are derived from ion composition measurements, and processes in the solar wind termination region and beyond are studied.

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