Results 21 to 30 of about 9,642 (217)

Change of Spectral Properties of Magnetic Field Fluctuations across Different Types of Interplanetary Shocks

open access: yesThe Astrophysical Journal Letters, 2023
The interaction between interplanetary (IP) shocks and the solar wind has been studied in the past for the understanding of energy dissipation mechanisms within collisionless plasmas.
Byeongseon Park   +7 more
doaj   +1 more source

Transport of cross helicity and radial evolution of alfvenicity in the solar wind [PDF]

open access: yes, 2004
A transport theory including cross helicity, magnetohydrodynamic(MHD) turbulence, and driving by shear and pickup ions, is applied to the radial evolution of the solar wind.
Bieber, J.W.   +5 more
core   +1 more source

Nature, Generation, and Dissipation of Alfvénic Kinks/Switchbacks Observed by Parker Solar Probe and WIND

open access: yesThe Astrophysical Journal, 2023
The discovery of very prominent magnetic kinks/switchbacks in the solar wind within 0.3 au has become a scientific highlight of the Parker Solar Probe (PSP) mission. This discovery points at the promising impact of small-scale solar activity on the inner
Chuanpeng Hou   +5 more
doaj   +1 more source

On the probability distribution function of small scale interplanetary magnetic field fluctuations [PDF]

open access: yes, 2004
In spite of a large number of papers dedicated to study MHD turbulence in the solar wind there are still some simple questions which have never been sufficiently addressed like: a)do we really know how the magnetic field vector orientation fluctuates in ...
Bavassano, B.   +6 more
core   +4 more sources

von Karman Correlation Similarity of the Turbulent Interplanetary Magnetic Field

open access: yesThe Astrophysical Journal Letters, 2021
Abstract A major development underlying much of hydrodynamic turbulence theory is the similarity decay hypothesis due to von Karman and Howarth here extended empirically to magnetic field fluctuations in the solar wind. In similarity decay the second-order correlation experiences a continuous transformation based on a universal ...
Sohom Roy   +4 more
openaire   +2 more sources

Solar interacting protons versus interplanetary protons in the core plus halo model of diffusive shock acceleration and stochastic re-acceleration [PDF]

open access: yes, 2015
With the first observations of solar γ-rays from the decay of pions, the relationship of protons producing ground level enhancements (GLEs) on the Earth to those of similar energies producing the γ-rays on the Sun has been debated.
A. Afanasiev   +41 more
core   +1 more source

Energy Conversion through a Fluctuation–Dissipation Relation at Kinetic Scales in the Earth’s Magnetosheath

open access: yesThe Astrophysical Journal, 2023
Low-frequency fluctuations in the interplanetary medium represent a turbulent environment where universal scaling behavior, generated by an energy cascade, has been investigated.
Federica Chiappetta   +4 more
doaj   +1 more source

Solar and Interplanetary Turbulence: Lagrangian Coherent Structures

open access: yes, 2020
<p>The dynamics of solar and interplanetary plasmas is governed by coherent structures such as current sheets and magnetic flux ropes which are responsible for the genesis of intermittent turbulence via magnetic reconnections in solar supergranular junctions, solar coronal loops, the shock-sheath region of an interplanetary ...
Abraham C.‐L. Chian   +13 more
openaire   +2 more sources

Multiple spacecraft observations of interplanetary shocks: Characteristics of the upstream ULF turbulence [PDF]

open access: yes, 1982
All interplanetary shocks observed by ISEE-3 and either ISEE-1 or ISEE-2 or both in 1978 and 1979 are examined for evidence of upstream waves. In order to characterize the properties of these shocks it is necessary to determine accurate shock normals. An
Bame, S. J.   +4 more
core   +2 more sources

Interpretation of Flat Energy Spectra Upstream of Fast Interplanetary Shocks

open access: yesThe Astrophysical Journal, 2023
Interplanetary shocks are large-scale heliospheric structures often caused by eruptive phenomena at the Sun, and represent one of the main sources of energetic particles.
Silvia Perri   +8 more
doaj   +1 more source

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