6–10 Sept 2021
Online
Europe/Rome timezone

X-ray and radio diagnostics of energetic electrons in the solar corona with STIX, Fermi, the Nancay Radioheliograph and the ORFEES spectrograph

9 Sept 2021, 15:15
15m
Online

Online

Talk Session 4 - From Radio to Gamma Rays: Near-Sun Manifestations and Triggering of Solar Flares and Coronal Mass Ejections Plenary 5

Speaker

Dr Sophie Musset (ESA/ESTEC)

Description

Solar flares are one of the common sources of solar energetic particles filling the heliosphere. The details of particle acceleration and escape from the solar atmosphere are still a subject of close investigation, and one of the scientific questions addressed by the Solar Orbiter mission. In this paper we will present preliminary results of an event that occurred on 9th May 2021, for which the thermal and non-thermal X-ray signatures were detected both from Solar Orbiter by STIX and from the Earth direction by Fermi/GBM, at different viewing angles. This event was well observed in radio with the ground-based instruments in Nançay: the ORFEES spectrograph and the Nancay Radioheliograph providing both spectral and spatial information . The X-ray event shows both an impulsive phase observed above 25 keV by STIX and FERMI and followed by a more gradual phase observed below 10 keV by STIX. In the decimetric/metric radio domain, this event shows a group of type III bursts extending to the interplanetary medium as well as type IV emission above 400 MHz. We shall discuss here the relative temporal evolutions of HXR emissions at different energies with those of the radio fluxes at different frequencies, as well as the spatial evolution of the radio sources at different frequencies. A first comparison of the HXR spectra of the event viewed under different angles will also been discussed.

Primary authors

Dr Sophie Musset (ESA/ESTEC) Dr Nicole Vilmer (LESIA, Observatoire de Paris, Universit ́e PSL, CNRS, Sorbonne Universit ́e, Universit ́e deParis, France) Dr Ludwig Klein (LESIA, Observatoire de Paris) Abdallah Hamini (LESIA, Observatoire de Paris)

Presentation materials

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