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Título del libro: 2019 Ursi Asia-Pacific Radio Science Conference, Ap-Rasc 2019
Título del capítulo: Fermi, wind, and SOHO observations of sustained gamma-ray emission from the Sun

Autores UNAM:
ALEJANDRO LARA SANCHEZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2019
Palabras clave:

Coronal mass ejection; Electromagnetic emissions; Gamma-ray emission; Large area telescopes; Linear relationships; Magnetic barriers; Radio and plasma waves; Solar energetic particle events; Gamma rays


Resumen:

We report on the linear relationship between the durations of two types of electromagnetic emissions associated with shocks driven by coronal mass ejections: sustained gamma-ray emission (SGRE) and interplanetary type II radio bursts. The relationship implies that shocks accelerate ~10 keV electrons (for type II bursts) and >300 MeV protons (for SGRE) roughly over the same duration. The SGRE events are from the Large Area Telescope (LAT) on board the Fermi satellite, while the type II bursts are from the Radio and Plasma Wave Experiment (WAVES) on board the Wind spacecraft. Here we consider five SGRE events that were not included in a previous study of events with longer duration (>5 hours). The five events are selected by relaxing the minimum duration to 3 hours. We found that some SGRE events had a tail that seems to last until the end of the associated type II burst. We pay special attention to the 2011 June 2 SGRE event that did not have a large solar energetic particle event at Earth or at the STEREO spacecraft that was well connected to the eruption. We suggest that the preceding CME acted as a magnetic barrier that mirrored protons back to Sun. © 2019 URSI. All rights reserved.


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