Intermittency and q-Gaussian Distributions in the Magnetic Field of the Very Local Interstellar Medium (VLISM) Observed by Voyager 1 and Voyager 2

被引:11
作者
Burlaga, L. F. [1 ]
Ness, N. F. [2 ]
Berdichevsky, D. B. [3 ,4 ]
Jian, L. K. [5 ]
Park, J. [2 ,5 ]
Szabo, A. [5 ]
机构
[1] Leonard F Burlaga Inc, Davidsonville, MD 21035 USA
[2] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA
[3] Consejo Nacl Invest Cient & Tecn, UNR, IFIR, Esmeralda & 27 Febrero, Rosario, Santa Fe, Argentina
[4] NASA, TRIDENT, GSFC, Greenbelt, MD 20771 USA
[5] NASA, Heliophys Sci Div, GSFC, Greenbelt, MD 20771 USA
关键词
Interstellar medium; Interstellar magnetic fields; SOLAR-WIND; TURBULENCE;
D O I
10.3847/2041-8213/abb199
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Voyager 1 (V1) observed q-Gaussian distributions of 1 hr increments of the components the magnetic field 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 B. Farther than similar to 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 B. The average values of q for the B-N component and transverse B-T component for these data in the VLISM are q = 1.32 +/- 0.03 and q = 1.22 +/- 0.03, 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.=.1.51.+/-.0.06 and q = 1.17 +/- 0.06 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.
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页数:6
相关论文
共 29 条
[1]  
[Anonymous], 2004, Nonextensive Entropy-Interdisciplinary Applications
[2]  
BEHANNON KW, 1977, SPACE SCI REV, V21, P235, DOI 10.1007/BF00211541
[3]  
Berdichevsky D.B., 2009, WHITE PAPER VOYAGER
[4]   Voyager observations of the magnetic field in the heliosheath and the local interstellar medium [J].
Burlaga, L. .
14TH ANNUAL INTERNATIONAL ASTROPHYSICS CONFERENCE: LINEAR AND NONLINEAR PARTICLE ENERGIZATION THROUGHOUT THE HELIOSPHERE AND BEYOND, 2015, 642
[5]   Tsallis distributions of magnetic field strength variations in the heliosphere:: 5 to 90 AU [J].
Burlaga, L. F. ;
F-Vinas, A. ;
Wang, C. .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2007, 112 (A7)
[6]  
Burlaga L. F., 2006, Astrophysical Journal, Letters, V644, pL83, DOI 10.1086/505577
[7]   Voyager 1 and 2 Observations of a Change in the Nature of Magnetic Fluctuations in the VLISM with Increasing Distance from the Heliopause [J].
Burlaga, L. F. ;
Ness, N. F. ;
Berdichevsky, D. B. ;
Jian, L. K. ;
Park, J. ;
Szabo, A. .
ASTRONOMICAL JOURNAL, 2020, 160 (01)
[8]   Magnetic field and particle measurements made by Voyager 2 at and near the heliopause [J].
Burlaga, L. F. ;
Ness, N. F. ;
Berdichevsky, D. B. ;
Park, J. ;
Jian, L. K. ;
Szabo, A. ;
Stone, E. C. ;
Richardson, J. D. .
NATURE ASTRONOMY, 2019, 3 (11) :1007-1012
[9]   Turbulence in the Outer Heliosheath [J].
Burlaga, L. F. ;
Florinski, V. ;
Ness, N. F. .
ASTROPHYSICAL JOURNAL, 2018, 854 (01)
[10]   OBSERVATIONS OF THE INTERSTELLAR MAGNETIC FIELD IN THE OUTER HELIOSHEATH: VOYAGER 1 [J].
Burlaga, L. F. ;
Ness, N. F. .
ASTROPHYSICAL JOURNAL, 2016, 829 (02)