Observation of a Magnetic Switchback in the Solar Corona
Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by the Parker Solar Probe. The switchbacks formation mechanism and sources are still unresolved, although candidate mechanisms include Alfv\ enic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, and geometrical effects related to the Parker spiral. This Letter presents observations from the Metis coronagraph on board a Solar Orbiter of a single large propagating S-shape ...
Telloni, Daniele; Zank, Gary; Stangalini, Marco; Downs, Cooper; Liang, Haoming; Nakanotani, Masaru; Andretta, Vincenzo; Antonucci, Ester; Sorriso-Valvo, Luca; Adhikari, Laxman; Zhao, Lingling; Marino, Raffaele; Susino, Roberto; Grimani, Catia; Fabi, Michele; Amicis, Raffaella; Perrone, Denise; Bruno, Roberto; Carbone, Francesco; Mancuso, Salvatore; Romoli, Marco; Da Deppo, Vania; Fineschi, Silvano; Heinzel, Petr; Moses, John; Naletto, Giampiero; Nicolini, Gianalfredo; Spadaro, Daniele; Teriaca, Luca; Frassati, Federica; Jerse, Giovanna; Landini, Federico; Pancrazzi, Maurizio; Russano, Giuliana; Sasso, Clementina; Biondo, Ruggero; Burtovoi, Aleksandr; Capuano, Giuseppe; Casini, Chiara; Casti, Marta; Chioetto, Paolo; De Leo, Yara; Giarrusso, Marina; Liberatore, Alessandro; Berghmans, David; Auchère, Fr\; Cuadrado, Regina; Chitta, Lakshmi; Harra, Louise; Kraaikamp, Emil; Long, David; Mandal, Sudip; Parenti, Susanna; Pelouze, Gabriel; Peter, Hardi; Rodriguez, Luciano; Schühle, Udo; Schwanitz, Conrad; Smith, Phil; Verbeeck, Cis; Zhukov, Andrei;
Published by: \apjl Published on: sep
YEAR: 2022   DOI: 10.3847/2041-8213/ac8104
Parker Data Used; Solar corona; Solar magnetic reconnection; Solar magnetic fields; Magnetohydrodynamics; Solar Coronal Waves; Slow solar wind; 1483; 1504; 1503; 1964; 1995; 1873; Astrophysics - Solar and Stellar Astrophysics
The first widespread solar energetic particle event of solar cycle 25 on 2020 November 29. Shock wave properties and the wide distribution of solar energetic particles
Context. On 2020 November 29, an eruptive event occurred in an active region located behind the eastern solar limb as seen from Earth. The event consisted of an M4.4 class flare, a coronal mass ejection, an extreme ultraviolet (EUV) wave, and a white-light (WL) shock wave. The eruption gave rise to the first widespread solar energetic particle (SEP) event of solar cycle 25, which was observed at four widely separated heliospheric locations (\ensuremath\sim230\textdegree). \ Aims: Our aim is to better understand the source of ...
Kouloumvakos, A.; Kwon, R.~Y.; ia, Rodr\; Lario, D.; Dresing, N.; Kilpua, E.~K.~J.; Vainio, R.; Török, T.; Plotnikov, I.; Rouillard, A.~P.; Downs, C.; Linker, J.~A.; Malandraki, O.~E.; Pinto, R.~F.; Riley, P.; Allen, R.~C.;
Published by: \aap Published on: apr
YEAR: 2022   DOI: 10.1051/0004-6361/202142515
Parker Data Used; Sun: general; Sun: particle emission; Sun: coronal mass ejections (CMEs); shock waves
Using Parker Solar Probe observations during the first four perihelia to constrain global magnetohydrodynamic models
Context. Parker Solar Probe (PSP) is providing an unprecedented view of the Sun s corona as it progressively dips closer into the solar atmosphere with each solar encounter. Each set of observations provides a unique opportunity to test and constrain global models of the solar corona and inner heliosphere and, in turn, use the model results to provide a global context for interpreting such observations.
Aims: In this study, we develop a set of global magnetohydrodynamic (MHD) model solutions of varying degrees of soph ...
Riley, Pete; Lionello, Roberto; Caplan, Ronald; Downs, Cooper; Linker, Jon; Badman, Samuel; Stevens, Michael;
Published by: Astronomy and Astrophysics Published on: 06/2021
YEAR: 2021   DOI: 10.1051/0004-6361/202039815
Sun: corona; Sun: heliosphere; Sun: magnetic fields; Solar wind; Sun: evolution; Interplanetary medium; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics; Parker Data Used
Predicting the Structure of the Solar Corona and Inner Heliosphere during Parker Solar Probe \textquoterights First Perihelion Pass
NASA\textquoterights Parker Solar Probe (PSP) spacecraft reached its first perihelion of 35.7 solar radii on 2018 November 5. To aid in mission planning, and in anticipation of the unprecedented measurements to be returned, in late October, we developed a three-dimensional magnetohydrodynamic (MHD) solution for the solar corona and inner heliosphere, driven by the then available observations of the Sun\textquoterights photospheric magnetic field. Our model incorporates a wave-turbulence-driven model to heat the corona. He ...
Riley, Pete; Downs, Cooper; Linker, Jon; Mikic, Zoran; Lionello, Roberto; Caplan, Ronald;
Published by: The Astrophysical Journal Published on: 04/2019
YEAR: 2019   DOI: 10.3847/2041-8213/ab0ec3
Astrophysics - Solar and Stellar Astrophysics; magnetohydrodynamics: MHD; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere; Sun: magnetic fields; waves