FRB 20201124A est une source de FRB (sursauts radio rapides) aux caractéristiques surprenantes. Le radiotélescope chinois FAST a observé en 2021 près de 2000 sursauts consécutifs sur un total de 88 heures, qui montraient une mesure de la rotation de Faraday qui oscillait, ainsi qu’une polarisation circulaire et une largeur de pulses atypiques. Aujourd’hui, les astrophysiciens chinois qui l’ont décortiqué proposent un modèle pour expliquer ces observations : il s’agirait d’un magnétar dans un système binaire avec une étoile entourée d’un disque de gaz… L’étude est parue dans Nature Communications.
Emissions
- Ça Se Passe Là-Haut
- #1386 : Détermination de l'environnement proche d'une source de FRB
Publié le par eric simon
Eric Simon
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