Results 11 to 20 of about 690 (186)

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

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

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

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

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

Multipoint Turbulence Analysis with HelioSwarm

open access: yesThe Astrophysical Journal Letters, 2023
Exploration of plasma dynamics in space, including turbulence, is entering a new era of multisatellite constellation measurements that will determine fundamental properties with unprecedented precision.
Francesco Pecora   +5 more
doaj   +1 more source

MHD Turbulence in the Solar Wind and Interplanetary Dynamo Effects [PDF]

open access: yesSymposium - International Astronomical Union, 1993
From the fluctuations of the velocity and magnetic field observed in different kinds of solar wind the fluctuating electric fields are derived, and their power spectra are constructed and analysed. The mean electromotive force ɛ generated by the turbulent motions depends upon the nature of the fluctuations.
Marsch, E., Tu, C.
openaire   +2 more sources

Radial evolution of power spectra of interplanetary Alfvénic turbulence [PDF]

open access: yesJournal of Geophysical Research: Space Physics, 1982
The radial evolution of the power spectra of the MHD turbulence within the trailing edge of high‐speed streams in the solar wind has been investigated with the magnetic field data of HELIOS 1 and 2 for heliocentric distances between 0.3 and 0.9 AU. In the analyzed frequency range 2.8 · 10−4 ‐ 8.3 · 10−2 Hz the computed spectra have, near the earth ...
B. Bavassano   +3 more
openaire   +1 more source

Non-universality of the Turbulent Spectra at Sub-ion Scales in the Solar Wind: Dispersive Effects versus the Doppler Shift

open access: yesThe Astrophysical Journal, 2023
Large surveys of the power spectral density of the magnetic fluctuations in the solar wind have reported different slope distributions at MHD, sub-ion and sub-electron scales: the smaller the scale, the broader the distribution.
Fouad Sahraoui, Shiyong Huang
doaj   +1 more source

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