SOLAR ORBITER AND ALMA OBSERVATIONS OF SMALL-SCALE BRIGHTENING FEATURES IN THE SOLAR ATMOSPHERE - HENRIK EKLUND

Observations at millimeter wavelengths provide accurate measurements of the plasma temperature of the heavily dynamic chromosphere, and the Atacama Large Millimeter/sub-millimeter Array (ALMA) offers ground-breaking observations in terms of sensitivity and angular resolution. In particular, synergy-observations with the Solar Orbiter are very powerful in order to probe the solar atmosphere.
We study so-far very perplexing small scale brightening features at both extreme ultraviolet wavelengths in Solar Orbiter data and at mm-wavelengths in ALMA data, to characterise and determine their formation process. Understanding their formation process increase our understanding of their possible contribution to the heating of the solar corona, the production of solar wind, violent eruptions and flares.