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Nonlinear Evolution of the Whistler Heat Flux Instability

Author(s): Kuzichev, IV; Vasko, IY; Soto-Chavez, AR; Tong, YG; Artemyev, AV; et al

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Abstract: We use the one-dimensional TRISTAN-MP particle-in-cell code to model the nonlinear evolution of the whistler heat flux instability (WHFI) that was proposed by Gary et al. and Gary & Li to regulate the electron heat flux in the solar wind and astrophysical plasmas. The simulations are initialized with electron velocity distribution functions typical for the solar wind. We perform a set of simulations at various initial values of the electron heat flux and beta(e). The simulations show that parallel whistler waves produced by the WHFI saturate at amplitudes consistent with the spacecraft measurements. The simulations also reproduce the correlations of the saturated whistler wave amplitude with the electron heat flux and beta(e) revealed in the spacecraft measurements. The major result is that parallel whistler waves produced by the WHFI do not significantly suppress the electron heat flux. The presented simulations indicate that coherent parallel whistler waves observed in the solar wind are unlikely to regulate the heat flux of solar wind electrons.
Publication Date: 4-Sep-2019
Electronic Publication Date: 10-Sep-2019
Citation: Kuzichev, IV, Vasko, IY, Soto-Chavez, AR, Tong, YG, Artemyev, AV, Bale, SD, Spitkovsky, A. (2019). Nonlinear Evolution of the Whistler Heat Flux Instability. ASTROPHYSICAL JOURNAL, 882 (2), 10.3847/1538-4357/ab3290
DOI: doi:10.3847/1538-4357/ab3290
ISSN: 0004-637X
Type of Material: Journal Article
Journal/Proceeding Title: ASTROPHYSICAL JOURNAL
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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