Measuring relative abundances in the solar corona with optimised linear combinations of spectral lines
Measuring relative abundances in the solar corona with optimised linear combinations of spectral lines
Context. Elemental abundances in some coronal structures differ significantly from photospheric abundances, with a dependence on the first ionization potential (FIP) of the element. Measuring these FIP-dependent abundance biases is important for coronal and heliospheric physics. Aims. We aim to build a method for optimal determination of FIP biases in …