The Differential Emission Measure Distribution in the Multiloop Corona

Abstract

This is a rebuttal of a recent Letter on the inadequacy of temperature measurements in the solar corona through narrowband filter and line ratios by Martens et al. We simulate the differential emission measure (DEM) distribution of a multiloop corona and find that the temperature profile of individual loops can be retrieved with narrowband filter ratios. The apparently flat DEM distributions constructed from Coronal Diagnostics Spectrometer line fluxes by Schmelz et al. are an artifact of a smoothing function (in temperature), while the unsmoothed DEM distribution reveals multiple peaks of near-isothermal loops.