Solar Orbiter’s Breakthrough: Decoding the Sun’s Million-Degree Corona

Solar Orbiter Extreme Ultraviolet Imager Sun Close

This image was taken by the Solar Orbiter’s Extreme Ultraviolet Imager (EUI) and shows clearly the arch-like hot loops of plasma that reach up into the solar corona. Credit: ESA & NASA/Solar Orbiter, EUI team

Recent images from the Solar Orbiter’s perihelion pass in October 2022 have unveiled the role of transient magnetic fields on the Sun’s surface in shaping the solar corona. These findings help explain the corona’s high temperature and contribute to our understanding of solar physics.

This new result is reported in the paper “Fleeting small-scale surface magnetic fields build the quiet-Sun corona” published in Astrophysical Journal Letters.

Reference: “Fleeting Small-scale Surface Magnetic Fields Build the Quiet-Sun Corona” by L. P. Chitta, S. K. Solanki, J. C. del Toro Iniesta, J. Woch, D. Calchetti, A. Gandorfer, J. Hirzberger, F. Kahil, G. Valori, D. Orozco Suárez, H. Strecker, T. Appourchaux, R. Volkmer, H. Peter, S. Mandal, R. Aznar Cuadrado, L. Teriaca, U. Schühle, D. Berghmans, C. Verbeeck, A. N. Zhukov and E. R. Priest, 5 October 2023, The Astrophysical Journal Letters.
DOI: 10.3847/2041-8213/acf136

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