High-resolution EUV imaging and spectroscopy of the corona

Physics

Scientific paper

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Sun, Euv Instrumentation, Solar Orbiter

Scientific paper

We present a set of imagers and spectrometer which have been proposed as a strawman payload on board the Solar Orbiter mission. The scientific requirements of the mission are put in the context of the main issues presently discussed in solar physics. The on-going successful space solar missions have evidenced a very fine structuring of the solar atmosphere and its role in various processes at work for coronal heating, wind acceleration, flaring activity, etc. This is especially true for magnetic reconnection which seems to proceed at many different scales. These results point at the need of observations substantially improving both the spatial resolution and the multi-temperature (multi-wavelength) coverage. Solar Orbiter offers a unique opportunity to analyze this fine structure (e.g. the internal structure of the thin loops observed by TRACE) in closed and open fields. It will allow for a diagnostic of regions such as the magnetic network which seems to play a major role in the wind acceleration, in conjunction with in-situ observations of the ejected plasma.

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