Magnetic fluctuation power near proton temperature anisotropy instability thresholds in the solar wind.

@article{Bale2009MagneticFP,
  title={Magnetic fluctuation power near proton temperature anisotropy instability thresholds in the solar wind.},
  author={Stuart. D. Bale and Justin C. Kasper and Gregory Gershom Howes and Eliot Quataert and Chadi S. Salem and David Sundkvist},
  journal={Physical review letters},
  year={2009},
  volume={103 21},
  pages={
          211101
        }
}
The proton temperature anisotropy in the solar wind is known to be constrained by the theoretical thresholds for pressure-anisotropy-driven instabilities. Here, we use approximately 1x10;{6} independent measurements of gyroscale magnetic fluctuations in the solar wind to show for the first time that these fluctuations are enhanced along the temperature anisotropy thresholds of the mirror, proton oblique firehose, and ion cyclotron instabilities. In addition, the measured magnetic… 

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