论文标题
离子级湍流加热太阳风质子的观察证据
Observational evidence for solar wind proton heating by ion-scale turbulence
论文作者
论文摘要
基于2005年至2015年风航天器的原位测量值，这封信首次报告了质子温度与太阳风中的湍流之间的明显依赖性依赖性连接。质子尺度湍流的统计分析表明，增加的螺旋性幅度对应于较陡的磁能光谱。特别是，存在质子垂直温度与尺度上的湍流磁能之间存在正力法相关性（带有坡度$ \ sim 0.4 $），$ 0.3 \ lissimkρ_p\ lyssim 1 $，$ k $是wavenumber和$ρ_p$ proton gyroradius。这些发现提供了质子尺度湍流太阳风加热的证据。他们还对太阳风中湍流耗散物理的物理学提供了洞察力和观察性的约束。
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.
