On the Role of Coronal Shocks for Accelerating Solar Energetic Electrons
Astrophysical Journal Letters, 2022 We study the role of coronal mass ejection (CME) driven shocks in the acceleration of solar energetic electrons. Using observations by the two STEREO spacecraft, we correlate electron peak intensities of solar energetic particle events measured in situ ...
N. Dresing +3 more
semanticscholar +1 more source
Solar Energetic Particle Events with Short and Long Onset Times
The Astrophysical Journal, 2023 Gradual solar energetic particle (SEP) events, usually attributed to shock waves driven by coronal mass ejections (CMEs), show a wide variety of temporal behaviors. For example, TO, the >10 MeV proton onset time with respect to the launch of the CME, has
Kosuke Kihara +3 more
doaj +1 more source
Strength of Coronal Mass Ejection-driven Shocks near the Sun and Their Importance in Predicting Solar Energetic Particle Events [PDF]
, 2007 Coronal shocks are important structures, but there are no direct observations of them in solar and space physics. The strength of shocks plays a key role in shock-related phenomena, such as radio bursts and solar energetic particle (SEP) generation. This
Chenglong Shen +5 more
semanticscholar +1 more source
The Space Weather Context of the First Extreme Event of Solar Cycle 25, on 2022 September 5
The Astrophysical Journal, 2023 The coronal mass ejection (CME) on 2022 September 5 was the fastest CME yet observed and measured in situ by a spacecraft inside the corona (0.06 au for the Parker Solar Probe).
Evangelos Paouris +5 more
doaj +1 more source
Evolution of the Alfvén Mach number associated with a coronal mass ejection shock [PDF]
Astronomy & Astrophysics, 2019 The Sun regularly produces large-scale eruptive events, such as coronal mass ejections (CMEs) that can drive shock waves through the solar corona. Such shocks can result in electron acceleration and subsequent radio emission in the form of a type II ...
C. Maguire +3 more
semanticscholar +1 more source
Direct In Situ Measurements of a Fast Coronal Mass Ejection and Associated Structures in the Corona [PDF]
Astrophysical JournalWe report on the first direct in situ measurements of a fast coronal mass ejection (CME) and shock in the corona, which occurred on 2022 September 5. In situ measurements from the Parker Solar Probe spacecraft near perihelion suggest two shocks, with the
Ying D. Liu +8 more
semanticscholar +1 more source
Corotating interaction regions as seen by the STEREO Heliospheric Imagers 2007 – 2010 [PDF]
, 2015 T.M. Conlon and A.O. Williams were supported by an STFC, UK studentship and S.E. Milan was supported by STFC grant ST/K001000/1. Date of Acceptance: 08/08/2015NASA’s Solar Terrestrial Relations Observatory (STEREO) mission has coincided with a pronounced
J. A. Davies +7 more
core +1 more source
Development and application of a global magnetic field evolution model for the solar corona [PDF]
, 2009 Magnetic fields are fundamental to the structure and dynamics of the Sun’s corona. Observations show them to be locally complex, with highly sheared and twisted fields visible in solar filaments/prominences.
Yeates, Anthony Robinson
core +2 more sources
Formation of the Injection Function of Solar Energetic Particles in Gradual Events
The Astrophysical Journal, 2023 We present a model for solar energetic particle injection into interplanetary space in gradual events, in which particle acceleration occurs in a limited region of the solar atmosphere.
Ivan Petukhov +2 more
doaj +1 more source
Simulation of the Solar Energetic Particle Event on 2020 May 29 Observed by Parker Solar Probe
The Astrophysical Journal, 2023 This paper presents a stochastic three-dimensional focused transport simulation of solar energetic particles (SEPs) produced by a data-driven coronal mass ejection (CME) shock propagating through a data-driven model of coronal and heliospheric magnetic ...
Lei Cheng +5 more
doaj +1 more source