SEP environment in the inner heliosphere from Solar Orbiter and Parker Solar Probe

The Sun drives a supersonic wind which inflates a giant plasma bubble in our very local interstellar neighborhood, the heliosphere. It is bathed in an extremely variable background of energetic ions and electrons which originate from a number of sources. Solar energetic particles (SEPs) are accelera...

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Bibliographic Details
Published in:arXiv.org 2024-08
Main Authors: Wimmer-Schweingruber, Robert F, Rodriguez-Pacheco, Javier, Ho, George C, Cohen, Christina M, Mason, Glenn M, the Solar Orbiter EPD, Parker Solar Probe ISIS teams
Format: Article
Language:English
Subjects:
Anomalous cosmic rays
Energetic particles
Heliosphere
Interstellar
Plasma bubbles
Solar Orbiter (ESA)
Solar probes
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Summary:The Sun drives a supersonic wind which inflates a giant plasma bubble in our very local interstellar neighborhood, the heliosphere. It is bathed in an extremely variable background of energetic ions and electrons which originate from a number of sources. Solar energetic particles (SEPs) are accelerated in the vicinity of the Sun, whereas shocks driven by solar disturbances are observed to accelerate energetic storm particles (ESPs). Moreover, a dilute population with a distinct composition forms the anomalous cosmic rays (ACRs) which are of a mixed interstellar-heliospheric origin. Particles are also accelerated at planetary bow shocks. We will present recent observations of energetic particles by Solar Orbiter and Parker Solar Probe, as well as other spacecraft that allow us to study the acceleration and transport of energetic particles at multiple locations in the inner heliosphere.
ISSN:2331-8422