Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer

The Fe flux $\Phi$ as a function of rigidity at the top of AMS in units of  $[{\rm m}^2 \cdot {\rm sr} \cdot {\rm s} \cdot {\rm GV}]^{-1}$ including errors due to statistics (stat.); contributions to the systematic error from the trigger and acceptance (acc.); the rigidity resolution function and unfolding (unf.); the absolute rigidity scale (scale); and the total systematic error (syst.). The contribution of individual sources to the systematic error are added in quadrature to arrive at the total systematic error.

The iron to oxygen flux ratio Fe/O as a function of rigidity including errors due to statistics (stat.); contributions to the systematic error from the trigger, acceptance, and background (acc.); the rigidity resolution function and unfolding (unf.); the absolute rigidity scale (scale); and the total systematic error (syst.). The statistical errors are the sum in quadrature of the ratios of iron and oxygen flux statistical errors to the corresponding flux values, multiplied by the Fe/O flux ratio. The systematic errors from the background subtraction, the trigger, and the event reconstruction and selection are likewise added in quadrature. The correlations in the systematic errors from the uncertainty in nuclear interaction cross sections, the unfolding and the absolute rigidity scale between the iron and oxygen fluxes have been taken into account in calculating the corresponding systematic errors of the Fe/O flux ratio. The contribution of individual sources to the systematic error are added in quadrature to arrive at the total systematic uncertainty.
 

The iron to helium flux ratio Fe/He as a function of rigidity including errors due to statistics (stat.); contributions to the systematic error from the trigger, acceptance, and background (acc.); the rigidity resolution function and unfolding (unf.); the absolute rigidity scale (scale); and the total systematic error (syst.). The statistical errors are the sum in quadrature of the ratios of iron and helium flux statistical errors to the corresponding flux values, multiplied by the Fe/He flux ratio. The systematic errors from the background subtraction, the trigger, and the event reconstruction and selection are likewise added in quadrature. The correlations in the systematic errors from the uncertainty in nuclear interaction cross sections, the unfolding and the absolute rigidity scale between the iron and helium fluxes have been taken into account in calculating the corresponding systematic errors of the Fe/He flux ratio. The contribution of individual sources to the systematic error are added in quadrature to arrive at the total systematic uncertainty.
 

The iron to silicon flux ratio Fe/Si as a function of rigidity including errors due to statistics (stat.); contributions to the systematic error from the trigger, acceptance, and background (acc.); the rigidity resolution function and unfolding (unf.); the absolute rigidity scale (scale); and the total systematic error (syst.). The statistical errors are the sum in quadrature of the ratios of iron and silicon flux statistical errors to the corresponding flux values, multiplied by the Fe/Si flux ratio. The systematic errors from the background subtraction, the trigger, and the event reconstruction and selection are likewise added in quadrature. The correlations in the systematic errors from the uncertainty in nuclear interaction cross sections, the unfolding and the absolute rigidity scale between the iron and silicon fluxes have been taken into account in calculating the corresponding systematic errors of the Fe/He flux ratio. The contribution of individual sources to the systematic error are added in quadrature to arrive at the total systematic uncertainty.