The electron impact excitation and ionization processes are crucial for modeling the spectra
of different astrophysical objects, from atmospheres of late-type stars to remnants of …

This book reflects on 8 decades of research on one of the longest-standing unsolved
problems in modern astrophysics: why does the Sun form a hot corona? The authors give a …

We examine the hypothesis that multipolar magnetic fields advected by photospheric
granules can contribute to heating the active chromosphere and corona. On 2020 …

Abstract We apply the HanleRT Tenerife Inversion Code to the spectropolarimetric
observations obtained by the Chromospheric Layer Spectropolarimeter. This suborbital …

We investigate theoretically the circular polarization signals induced by the Zeeman effect in
the Fe ii lines of the 279.3–280.7 nm spectral range of the CLASP2 space experiment and …

Having undertaken this wide-ranging review, we can now offer a perspective on the current
state of research related to coronal heating. Necessarily subjective, and intentionally thought …

Homer's Achilles was endowed with seeming immortality, his mother Thetis dip** her
baby son into the River Styx in an attempt to make him invulnerable, for it had been foretold …

The hurdles preventing the clear identification of specific heating mechanisms are
essentially unchanged from the 1960s. Some challenges such as limited instrumental and …