The solar wind is the extension of the Sun's hot and ionized corona, and it exists in a state of
continuous expansion into interplanetary space. The radial distance at which the wind's …

Drawing connections between heliospheric spacecraft and solar wind sources is a vital step
in understanding the evolution of the solar corona into the solar wind and contextualizing in …

The transition from subAlfvénic to superAlfvénic flow in the solar atmosphere is examined by
means of Parker Solar Probe (PSP) measurements during solar encounters 8 to 14. Around …

Aims. We applied the quasi-thermal noise (QTN) method to Parker Solar Probe (PSP)
observations to derive the total electron temperature (T e). We combined a set of encounters …

Map** solar wind plasma back to its source is often achieved using the 'two-step ballistic
backmap**'method. Solar wind observations are mapped through the heliosphere to the …

Dark photon dark matter emerges as a compelling candidate for ultralight bosonic dark
matter, detectable through resonant conversion into photons within a plasma environment …

Motivated by theoretical, numerical, and observational evidence, we explore the possibility
that the critical transition between sub-Alfvénic flow and super-Alfvénic flow in the solar …

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 …

Alfvén waves, considered one of the primary candidates for heating and accelerating the fast
solar wind, are ubiquitous in spacecraft observations, yet their origin remains elusive. In this …

Aims. We present the first measurements of the angular-momentum flux in the solar wind
recorded by the Solar Orbiter spacecraft. Our aim is to validate these measurements to …