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Communication Dans Un Congrès Année : 2021

The cosmic ray content of superbubbles

Résumé

Although most massive stars are thought to live inside clusters giving rise to galactic-scalesuperbubbles, a complete model of cosmic ray production in these objects is still missing in theliterature. We present an attempt to model particles acceleration in these systems including all therelevant physical processes. The acceleration mechanisms taking place in superbubbles differ fromthat occurring at isolated supernova remnants in several aspects. The presence of a magnetizedshell is expected to efficiently confine the particles, which may therefore experience successivereaccelerations at supernovae shocks. The medium is also though to be highly turbulent, whichhardens the particle spectra and makes shock acceleration nonlinear. Spectra are further shapedby losses, stellar winds, and the leakage of the interstellar cosmic rays through the superbubbleshell. We discuss typical superbubble spectra and detail the time-dependent emission of theseobjects.
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hal-03448649 , version 1 (25-11-2021)

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Thibault Vieu, Stefano Gabici, Vincent Tatischeff. The cosmic ray content of superbubbles. 37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.147, ⟨10.22323/1.395.0147⟩. ⟨hal-03448649⟩
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