Linking Small-scale Solar Wind Properties with Large-scale Coronal Source Regions through Joint Parker Solar Probe–Metis/Solar Orbiter Observations
Authors: Telloni Daniele , Zank Gary P. , Sorriso-Valvo Luca , D’Amicis Raffaella , Panasenco Olga , Susino Roberto , Bruno Roberto , Perrone Denise , Adhikari Laxman , Liang Haoming , Nakanotani Masaru , Zhao Lingling , Hadid Lina Z. , Sánchez-Cano Beatriz , Verscharen Daniel , Velli Marco , Grimani Catia , Marino Raffaele , Carbone Francesco , Mancuso Salvatore , Biondo Ruggero , Pagano Paolo , Reale Fabio , Bale Stuart D. , Kasper Justin C. , Case Anthony W. , de Wit Thierry Dudok , Goetz Keith , Harvey Peter R. , Korreck Kelly E. , Larson Davin , Livi Roberto , MacDowall Robert J. , Malaspina David M. , Pulupa Marc , Stevens Michael L. , Whittlesey Phyllis , Romoli Marco , Andretta Vincenzo , Deppo Vania Da , Fineschi Silvano , Heinzel Petr , Moses John D. , Naletto Giampiero , Nicolini Gianalfredo , Spadaro Daniele , Stangalini Marco , Teriaca Luca , Capobianco Gerardo , Capuano Giuseppe E. , Casini Chiara , Casti Marta , Chioetto Paolo , Corso Alain J. , Leo Yara De , Fabi Michele , Frassati Federica , Frassetto Fabio , Giordano Silvio , Guglielmino Salvo L. , Jerse Giovanna , Landini Federico , Liberatore Alessandro , Magli Enrico , Massone Giuseppe , Messerotti Mauro , Pancrazzi Maurizio , Pelizzo Maria G. , Romano Paolo , Sasso Clementina , Schühle Udo , Slemer Alessandra , Straus Thomas , Uslenghi Michela , Volpicelli Cosimo A. , Zangrilli Luca , Zuppella Paola , Abbo Lucia , Auchère Frédéric , Cuadrado Regina Aznar , Berlicki Arkadiusz , Ciaravella Angela , Lamy Philippe , Lanzafame Alessandro , Malvezzi Marco , Nicolosi Piergiorgio , Nisticò Giuseppe , Peter Hardi , Solanki Sami K. , Strachan Leonard , Tsinganos Kanaris , Ventura Rita , Vial Jean-Claude , Woch Joachim , Zimbardo Gaetano 
Published: August 2022

Abstract
The solar wind measured in situ by Parker Solar Probe in the very inner heliosphere is studied in combination with the remote-sensing observation of the coronal source region provided by the METIS coronagraph aboard Solar Orbiter. The coronal outflows observed near the ecliptic by Metis on 2021 January 17 at 16:30 UT, between 3.5 and 6.3 R
⊙ above the eastern solar limb, can be associated with the streams sampled by PSP at 0.11 and 0.26 au from the Sun, in two time intervals almost 5 days apart. The two plasma flows come from two distinct source regions, characterized by different magnetic field polarity and intensity at the coronal base. It follows that both the global and local properties of the two streams are different. Specifically, the solar wind emanating from the stronger magnetic field region has a lower bulk flux density, as expected, and is in a state of well-developed Alfvénic turbulence, with low intermittency. This is interpreted in terms of slab turbulence in the context of nearly incompressible magnetohydrodynamics. Conversely, the highly intermittent and poorly developed turbulent behavior of the solar wind from the weaker magnetic field region is presumably due to large magnetic deflections most likely attributed to the presence of switchbacks of interchange reconnection origin.