Results 61 to 70 of about 728 (195)
The Astrophysical Journal Supplement SeriesGalactic cosmic-ray (GCR) modulation studies have suggested that the ratio between the parallel and perpendicular mean free paths (MFPs) of these particles is a key parameter governing the observed, steep increase in high-energy GCR intensities within ...
J. S. Troskie, N. E. Engelbrecht
doaj +1 more source
The heliospheric modulation of cosmic ray boron and carbon [PDF]
Annales Geophysicae, 2004 The observed boron to carbon ratio (B/C) at Earth provides a good measure of the overall secondary to primary ratio of galactic cosmic rays. This makes B/C an important constraint and test for the validity and general applicability of theoretical and ...
M. S. Potgieter, U. W. Langner
doaj +1 more source
Plasma and Variability in the Heliosheath
Journal of Physics: Conference Series, 2015 Voyager 2 (V2) is making the first direct plasma measurements of the heliosheath and is moving outward about 3 AU/yr. This paper has two foci. It provides an update on plasma conditions in the heliosheath out to 108 AU and discusses the variability of plasma parameters in the heliosheath.
openaire +1 more source
A model for the nose region of the heliosheath
Journal of Physics: Conference Series, 2015 The Voyager 1 spacecraft is currently in the vicinity of the heliopause, which separates the heliosphere from the local interstellar medium. There has been a precipitous decrease in particles accelerated in the heliosphere, and a substantial increase in galactic cosmic rays (GCRs), suggesting easy escape of the former across the heliopause, and entry ...
L A Fisk, G Gloeckler
openaire +1 more source
SCALING OF THE GROWTH RATE OF MAGNETIC ISLANDS IN THE HELIOSHEATH [PDF]
The Astrophysical Journal, 2012 Current sheets thinner than the ion inertial length are unstable to the tearing instability and will develop magnetic islands that grow due to magnetic reconnection. We investigate whether the growth of magnetic islands in a current sheet can continue indefinitely, or in the case of the heliosheath until reaching a neighboring current sheet, and at ...
Schoeffler, K. M. +2 more
openaire +2 more sources
Magnetic islands in the heliosheath: Properties and implications [PDF]
, 2012 In the heliosheath there are sectors of magnetic fields separated by current sheets thinner than the ion inertial length and thus subject to the tearing instability. This instability allows the development of magnetic islands that grow due to magnetic
Schoeffler, Kevin Michael
core +1 more source
Voyager 2 observation of the multifractal spectrum in the heliosphere and the heliosheath [PDF]
Nonlinear Processes in Geophysics, 2013 We look in detail at the multifractal scaling of the fluctuations in the interplanetary magnetic field strength as measured onboard Voyager 2 in the entire heliosphere and even in the heliosheath.
W. M. Macek, A. Wawrzaszek
doaj +1 more source
Heliosheath processes and the structure of the heliopause: modeling energetic particles, cosmic rays, and magnetic fields [PDF]
, 2017 Publication resulting from an International ISSI Team of the same name. Submitted to Space Science ReviewsInternational audienceThis paper summarizes the results obtained by the team "Heliosheath Processes and the Structure of the Heliopause: Modeling ...
N. V. Pogorelov +34 more
core +2 more sources
The Astrophysical Journal LettersWe analyze Voyager 1 magnetic field data through 2024 to study fluctuations from the inner heliosheath into the very local interstellar medium (VLISM).
L.-L. Zhao +10 more
doaj +1 more source
Transport Equation of Kappa Distributions in the Heliosphere
The Astrophysical Journal, 2023 In this paper, we develop the transport equation of kappa, the fundamental thermodynamic parameter that labels kappa distributions of particle velocities.
G. Livadiotis, D. J. McComas
doaj +1 more source