arXiv Open Access 2020

Observational evidence for solar wind proton heating by ion-scale turbulence

G. Q. Zhao Y. Lin X. Y. Wang D. J. Wu H. Q. Feng +3 lainnya

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Abstrak

Based on in-situ measurements by Wind spacecraft from 2005 to 2015, this letter reports for the first time a clearly scale-dependent connection between proton temperatures and the turbulence in the solar wind. A statistical analysis of proton-scale turbulence shows that increasing helicity magnitudes correspond to steeper magnetic energy spectra. In particular, there exists a positive power-law correlation (with a slope $\sim 0.4$) between the proton perpendicular temperature and the turbulent magnetic energy at scales $0.3 \lesssim kρ_p \lesssim 1$, with $k$ being the wavenumber and $ρ_p$ being the proton gyroradius. These findings present evidence of solar wind heating by the proton-scale turbulence. They also provide insight and observational constraint on the physics of turbulent dissipation in the solar wind.

Topik & Kata Kunci

physics.space-ph astro-ph.SR physics.plasm-ph

Penulis (8)

G. Q. Zhao

Y. Lin

X. Y. Wang

D. J. Wu

H. Q. Feng

Q. Liu

A. Zhao

H. B. Li

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APA MLA BibTeX

Zhao, G.Q., Lin, Y., Wang, X.Y., Wu, D.J., Feng, H.Q., Liu, Q. et al. (2020). Observational evidence for solar wind proton heating by ion-scale turbulence. https://arxiv.org/abs/2009.00120

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Tahun Terbit: 2020
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓