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

Voyager 1 (V1) observed q -Gaussian distributions of 1 hr increments of the components the magnetic field 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 componen...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Astrophysical journal. Letters 2020-09, Vol.901 (1), p.L2
Hauptverfasser: Burlaga, L. F., Ness, N. F., Berdichevsky, D. B., Jian, L. K., Park, J., Szabo, A.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Voyager 1 (V1) observed q -Gaussian distributions of 1 hr increments of the components the magnetic field 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 . 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 . 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.
ISSN:2041-8205
2041-8213
DOI:10.3847/2041-8213/abb199