Whistler instability driven by the sunward electron deficit in the solar wind. High-cadence Solar Orbiter observations

  title={Whistler instability driven by the sunward electron deficit in the solar wind. High-cadence Solar Orbiter observations},
  author={Laura Bervcivc and Daniel Verscharen and Christopher J. Owen and Lucas Colomban and Matthieu Kretzschmar and Thomas Chust and Milan Maksimovi'c and Dhiren Kataria and Etienne Behar and Matthieu Berthomier and Roberto Bruno and Vito Fortunato and Christopher W. Kelly and Yu. V. Khotyaintsev and Gethyn R. Lewis and Stefano Livi and Philippe Louarn and Giannalisa Mele and Georgios Nicolaou and Gillian Watson and Robert T. Wicks},
  journal={Astronomy \& Astrophysics},
Context. Solar wind electrons play an important role in the energy balance of the solar wind acceleration by carrying energy into interplanetary space in the form of electron heat flux. The heat flux is stored in the complex electron velocity distribution functions (VDFs) shaped by expansion, Coulomb collisions, and field-particle interactions. Aims. We investigate how the suprathermal electron deficit in the anti-strahl direction, which was recently discovered in the near-Sun solar wind, drives a… 

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