Turbulence Driving by Interstellar Pickup Ions in the Outer Solar Wind

Autor:	Isenberg, Philip A., Vasquez, Bernard J., Smith, Charles W.
Rok vydání:	2023
Předmět:	Astrophysics - Solar and Stellar Astrophysics Physics - Plasma Physics Physics - Space Physics
Druh dokumentu:	Working Paper
DOI:	10.3847/1538-4357/acb337
Popis:	We revisit the question of how the unstable scattering of interstellar pickup ions (PUIs) may drive turbulence in the outer solar wind, and why the energy released into fluctuations by this scattering appears to be significantly less than the standard bispherical prediction. We suggest that energization of the newly picked-up ions by the ambient turbulence during the scattering process can result in a more spherical distribution of PUIs, and reduce the generated fluctuation energy to a level consistent with the observations of turbulent intensities and core solar wind heating. This scenario implies the operation of a self-regulation mechanism that maintains the observed conditions of turbulence and heating in the PUI-dominated solar wind. Comment: To be published in The Astrophysical Journal
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2301.08710 Zobrazit plný text záznamu View this record from Arxiv