0549682 - ASÚ 2022 RIV US eng J - Journal Article
Telloni, D. - Andretta, V. - Antonucci, E. - Heinzel, Petr … Total 71 authors
Exploring the Solar Wind from Its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter-Parker Solar Probe Quadrature.
Astrophysical Journal Letters. Roč. 920, č. 1 (2021), č. článku L14. ISSN 2041-8205. E-ISSN 2041-8213
Institutional support: RVO:67985815
Keywords : magnetohydrodynamics * space plasmas * interplanetary turbulence
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 8.811, year: 2021
Method of publishing: Limited access
https://doi.org/10.3847/2041-8213/ac282f

This Letter addresses the first Solar Orbiter (SO)-Parker Solar Probe (PSP) quadrature, occurring on 2021 January 18 to investigate the evolution of solar wind from the extended corona to the inner heliosphere. Assuming ballistic propagation, the same plasma volume observed remotely in the corona at altitudes between 3.5 and 6.3 solar radii above the solar limb with the Metis coronagraph on SO can be tracked to PSP, orbiting at 0.1 au, thus allowing the local properties of the solar wind to be linked to the coronal source region from where it originated. Thanks to the close approach of PSP to the Sun and the simultaneous Metis observation of the solar corona, the flow-aligned magnetic field and the bulk kinetic energy flux density can be empirically inferred along the coronal current sheet with an unprecedented accuracy, allowing in particular estimation of the Alfven radius at 8.7 solar radii during the time of this event. This is thus the very first study of the same solar wind plasma as it expands from the sub-Alfvenic solar corona to just above the Alfven surface.
Permanent Link: http://hdl.handle.net/11104/0325625