The Fe/O elemental abundance ratio in the solar wind

Details The Fe/O elemental abundance ratio in the solar wind The Fe/O elemental abundance ratio in the solar wind

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..255a&link_type=abstract

The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 255-258 (1999).

Physics

4

Particle Emission, Solar Wind

Scientific paper

We analyze the Fe/O elemental abundance ratio in the solar wind from SOHO/CELIAS/CTOF data. Analyzed in different solar wind regimes this ratio is indicative of the strength of the FIP fractionation process because iron is a low FIP element and oxygen is a high FIP element. It is investigated whether there is a significant fractionation of the Fe/O ratio in the coronal hole solar wind. For the first time, to our knowledge, we attempt to eliminate the influence of model-dependent parameters on the derivation of the photospheric Fe/O ratio thereby increasing the accuracy of its determination. The Fe/O ratio in coronal hole solar wind is slightly higher than in the photosphere. Even with our optimistic estimates of the uncertainties of the photospheric Fe/O ratio the observed fractionation is only marginally significant.

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