The Isotopic Composition of Iron in the Solar Wind: First Measurements with the MASS Sensor on the Wind Spacecraft

Details The Isotopic Composition of Iron in the Solar Wind: First Measurements with the MASS Sensor on the Wind Spacecraft The Isotopic Composition of Iron in the Solar Wind: First Measurements with the MASS Sensor on the Wind Spacecraft

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...474l..69o&link_type=abstract

Astrophysical Journal Letters v.474, p.L69

Astronomy and Astrophysics

Astronomy

6

Sun: Solar Wind, Sun: Corona, Sun: Particle Emission

Scientific paper

The isotopic composition of iron in the solar wind has been measured for the first time with the MASS sensor on the Wind spacecraft. Measurements were made from 1994 December 22 to 1996 February 9 in the energy range 0.55--1.3 keV nucleon-1 (320--500 km s-1). We obtained the values 54Fe/56Fe = 8.5 ^{+0.5}_{-2.2} % and 57Fe/56Fe <= 5%. Previously, measurements were reported for meteoritic material (e.g., Anders & Grevesse 1989, 54Fe/56Fe = 6.3% and 57Fe/56Fe = 2.3%) and the origin of Galactic cosmic rays (e.g., Connell & Simpson 1995, 54Fe/56Fe = 8.9% +/- 0.8% and 57Fe/56Fe = 3.8% +/- 0.5%).

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