EGU22-10948
https://doi.org/10.5194/egusphere-egu22-10948
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

On the scaling features of magnetic field fluctuations at sub-protonic scales

Giuseppe Consolini1, Simone Benella1, Tommaso Alberti1, and Mirko Stumpo2,1
Giuseppe Consolini et al.
  • 1Istituto Nazionale di Astrofisica, Istituto di Astrofisica e Planetologia Spaziali, Roma, Italy (giuseppe.consolini@inaf.it)
  • 2Dip. di Fisica, Università di Roma “Tor Vergata”, Rome, Italy

Fluctuations of magnetic field in space plasmas at sub-protonic scales have been supposed to be the result of a turbulence process involving different wave modes (EMHD, KAW, …). However, the observed spectral and scaling features seem to be non-universal. Furthermore, there is a wide evidence for the occurrence of a global scale invariance. Now, the complex nature of the fluctuations at these scales could be due to the interweaving of fluid and kinetic processes that might alter the usual scenario expected for the occurrence of strong turbulence. Here, using high-resolution data from the Parker’ Solar Probe mission we attempt an analysis of the scaling features of magnetic field fluctuations at sub-protonic scales using different approaches: i) the structure function analysis, ii) the singularity spectrum analysis and the rank-ordered multifractal analysis. The aim of these multiple approaches is to unveil the inherent complexity of fluctuation field at sub-protonic scale and to understand the controversial issues related to the occurrence of intermittency at these scales.

We acknowledge financial support by Italian MIUR-PRIN grant 2017APKP7T on Circumterrestrial Environment: Impact of Sun-Earth Interaction.

How to cite: Consolini, G., Benella, S., Alberti, T., and Stumpo, M.: On the scaling features of magnetic field fluctuations at sub-protonic scales, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-10948, https://doi.org/10.5194/egusphere-egu22-10948, 2022.