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Intermittency and q-Gaussian Distributions in the Magnetic Field of the Very Local Interstellar Medium (VLISM) Observed by Voyager 1 and Voyager 2
The Astrophysical Journal Letters ( IF 8.8 ) Pub Date : 2020-09-16 , DOI: 10.3847/2041-8213/abb199
L. F. Burlaga 1 , N. F. Ness 2 , D. B. Berdichevsky 3, 4 , L. K. Jian 5 , J. Park 2, 5 , A. Szabo 5
Affiliation  

Voyager 1 (V1) observed q-Gaussian distributions of 1 hr increments of the components the magnetic field ${\boldsymbol{B}}$ throughout the very local interstellar medium (VLISM) on scales on the order of 1 year, from 2013 through 2019, excluding the disturbed regions near two shocks. The intermittency of the components of B is described by q from the q-Gaussian distributions of 1 hr increments B as well as by the kurtosis K derived from the time series of the increments of ${\boldsymbol{B}}$. Farther than ∼5 au from the heliopause, Voyager 1 observed larger intermittency in the fluctuations of the predominantly transverse component B N and in the nearly longitudinal component B T of ${\boldsymbol{B}}$. The average values of q for the B N component and transverse B T component for these data in the VLISM are q=1.320.03 and q=1.220.03, respectively. The corresponding average values of the kurtosis are K=7.2 and K=4.9. Voyager 2 (V2) crossed the heliopause on 2018 November 5. Near the heliopause, in 2019, V2 observed large intermittency in 1 hr increments of the compressive component B T and smaller intermittency in B N. The Voyager 2 observations give q=1.510.06 and q=1.170.06 for the B N and B T components of B, respectively, as well as K=7.2 and K=12.3, respectively. The intermittency in B T and B N, observed by V2 near the heliopause was significantly larger than that observed by V1 when it was near the heliopause.



中文翻译:

航海者 1 号和航海者 2 号观测到的极局域星际介质 (VLISM) 磁场中的间歇性和 q-高斯分布

航海者 1 号 (V1)在 2013 年至 2019 年期间,在大约 1 年的尺度上观察了整个非常局域星际介质 (VLISM) 中磁场分量 1 小时增量的q -高斯分布${\boldsymbol{B}}$,不包括两次冲击附近的扰动区域. 的成分的间歇通过描述qq 1个小时增量-gaussian分布以及由峰度ķ从时间序列的增量的衍生${\boldsymbol{B}}$。距离日球层顶约 5 天文单位以外,航海者 1 号观察到主要横向分量B N的波动具有更大的间歇性并且在 的近纵向分量B T${\boldsymbol{B}}$。的平均值q Ñ分量和横向 Ť组件,用于在VLISM这些数据是q = 1.320.03和q = 1.220.03,分别。对应的峰态平均值为K =7.2 和K =4.9。航海者 2 (V2) 于 2018 年 11 月 5 日穿越了日球层顶。 在 2019 年的日球层顶附近,V2 观察到压缩分量B T以 1 小时增量为单位的大间歇性和B N 中较小的间歇性。航海者 2 号观测给出q = 1.510.06和q = 1.170.06为 Ñ Ť的部件分别以及ķ = 7.2和ķ = 12.3,分别。V2在日球层顶附近观测到的B TB N的间歇性显着大于V1在靠近日光层顶时观测到的间歇性。

更新日期:2020-09-16
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