Ion alfvén velocity fluctuations and implications for the diffusion of streaming cosmic rays

@inproceedings{Beattie2022IonAV,
  title={Ion alfv{\'e}n velocity fluctuations and implications for the diffusion of streaming cosmic rays},
  author={James R. Beattie and Mark R. Krumholz and Christoph Federrath and Matt L. Sampson and Roland M. Crocker},
  booktitle={Frontiers in Astronomy and Space Sciences},
  year={2022}
}
The interstellar medium (ISM) of star-forming galaxies is magnetized and turbulent. Cosmic rays (CRs) propagate through it, and those with energies from ∼ GeV − TeV are likely subject to the streaming instability, whereby the wave damping processes balances excitation of resonant ionic Alfvén waves by the CRs, reaching an equilibrium in which the propagation speed of the CRs is very close to the local ion Alfvén velocity. The transport of streaming CRs is therefore sensitive to ionic Alfvén… 
2 Citations

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