A Fresh View of the Extreme‐Ultraviolet Corona from the Application of a New Image‐Processing Technique

Abstract

The Extreme-ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO) has provided (and continues to provide) the solar physics community with an unprecedented view of the extreme-ultraviolet (EUV) transition region and corona. In particular, it has observed EUV bright points, coronal holes, loops, and arcades, as well as dynamical events such as flares, EIT waves, and mass ejections. However, the multiscale nature of the observed solar features has not been fully exploited so far. In this paper, we introduce a technique to enhance the EUV features based on their multiscale nature, show a few examples of features not revealed with standard image-processing techniques (and therefore not previously noticed in the EIT data set), and make the solar physics community aware of the availability of the full EIT data set as processed with this novel technique.