Exploring the Solar Wind from Its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter-Parker Solar Probe Quadrature

(Telloni), Daniele; (Andretta), Vincenzo; (Antonucci), Ester; (Bemporad), Aless; Ro,; (Capuano), Giuseppe E.; (Fineschi), Silvano; (Giordano), Silvio; (Habbal), Shadia; (Perrone), Denise; (Pinto), Rui F.; (Sorriso-Valvo), Luca; (Spadaro), Daniele; (Susino), Roberto; (Woodham), Lloyd D.; (Zank), Gary P.; (Romoli), Marco; (Bale), Stuart D.; (Kasper), Justin C.; (Auch(`e)re), Fr('e)d('e)ric; (Bruno), Roberto; (Capobianco), Gerardo; (Case), Anthony W.; (Casini), Chiara; (Casti), Marta; (Chioetto), Paolo; (Corso), Alain J.; (Da Deppo), Vania; (De Leo), Yara; (Dudok de Wit), Thierry; (Frassati), Federica; (Frassetto), Fabio; (Goetz), Keith; (Guglielmino), Salvo L.; (Harvey), Peter R.; (Heinzel), Petr; (Jerse), Giovanna; (Korreck), Kelly E.; (L,; ini), Federico; (Larson), Davin; (Liberatore), Aless; Ro,; (Livi), Roberto; (MacDowall), Robert J.; (Magli), Enrico; (Malaspina), David M.; (Massone), Giuseppe; (Messerotti), Mauro; (Moses), John D.; (Naletto), Giampiero; (Nicolini), Gianalfredo; (Nistic(`o)), Giuseppe; (Panasenco), Olga; (Pancrazzi), Maurizio; (Pelizzo), Maria G.; (Pulupa), Marc; (Reale), Fabio; (Romano), Paolo; (Sasso), Clementina; (Sch(\,

doi: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 Alfvén 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-Alfvénic solar corona to just above the Alfvén surface.

Exploring the Solar Wind from Its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter-Parker Solar Probe Quadrature / {Telloni}, Daniele and {Andretta}, Vincenzo and {Antonucci}, Ester and {Bemporad}, Alessandro and {Capuano}, Giuseppe E. and {Fineschi}, Silvano and {Giordano}, Silvio and {Habbal}, Shadia and {Perrone}, Denise and {Pinto}, Rui F. and {Sorriso-Valvo}, Luca and {Spadaro}, Daniele and {Susino}, Roberto and {Woodham}, Lloyd D. and {Zank}, Gary P. and {Romoli}, Marco and {Bale}, Stuart D. and {Kasper}, Justin C. and {Auch{`e}re}, Fr{'e}d{'e}ric and {Bruno}, Roberto and {Capobianco}, Gerardo and {Case}, Anthony W. and {Casini}, Chiara and {Casti}, Marta and {Chioetto}, Paolo and {Corso}, Alain J. and {Da Deppo}, Vania and {De Leo}, Yara and {Dudok de Wit}, Thierry and {Frassati}, Federica and {Frassetto}, Fabio and {Goetz}, Keith and {Guglielmino}, Salvo L. and {Harvey}, Peter R. and {Heinzel}, Petr and {Jerse}, Giovanna and {Korreck}, Kelly E. and {Landini}, Federico and {Larson}, Davin and {Liberatore}, Alessandro and {Livi}, Roberto and {MacDowall}, Robert J. and {Magli}, Enrico and {Malaspina}, David M. and {Massone}, Giuseppe and {Messerotti}, Mauro and {Moses}, John D. and {Naletto}, Giampiero and {Nicolini}, Gianalfredo and {Nistic{`o}}, Giuseppe and {Panasenco}, Olga and {Pancrazzi}, Maurizio and {Pelizzo}, Maria G. and {Pulupa}, Marc and {Reale}, Fabio and {Romano}, Paolo and {Sasso}, Clementina and {Sch{\. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - ELETTRONICO. - 920:(2021), pp. 14-23. [10.3847/2041-8213/ac282f]