The game of life on a magnetar crust: From gamma-ray flares to FRBs

Lander, Sam (2023) The game of life on a magnetar crust: From gamma-ray flares to FRBs. The Astrophysical Journal Letters, 947 (1). ISSN 2041-8205

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This Letter presents a model to unify the diverse range of magnetar activity, through the building and release of elastic stress from the crust. A cellular automaton drives both local and global yielding of the crust, leading to braiding of coronal loops and energy release. The model behaves like a real magnetar in many ways: giant flares and small bursts both occur, as well as periods of quiescence whose typical duration is either ≲1 yr or ∼10-30 yr. The burst energy distribution broadly follows an earthquake-like power law over the energy range 10 40-10 45 erg. The local nature of coronal loops allows for the possibility of high-energy and fast radio bursts from the same magnetar. Within this paradigm, magnetar observations can be used to constrain the poorly understood mechanical properties of the neutron-star crust.

Item Type: Article
Uncontrolled Keywords: astronomy and astrophysics,space and planetary science ,/dk/atira/pure/subjectarea/asjc/3100/3103
Faculty \ School: Faculty of Science > School of Physics
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 27 Apr 2023 10:30
Last Modified: 07 Aug 2023 12:30
DOI: 10.3847/2041-8213/acca1f

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