Density Fluctuations in the Solar Wind Driven by Alfven Wave Parametric Decay

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F18%3A00496116" target="_blank" >RIV/67985815:_____/18:00496116 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3847/2041-8213/aaabbe" target="_blank" >http://dx.doi.org/10.3847/2041-8213/aaabbe</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/2041-8213/aaabbe" target="_blank" >10.3847/2041-8213/aaabbe</a>

Result language

angličtina

Original language name

Density Fluctuations in the Solar Wind Driven by Alfven Wave Parametric Decay

Original language description

Measurements and simulations of inertial compressive turbulence in the solar wind are characterized by anti-correlated magnetic fluctuations parallel to the mean field and density structures. This signature has been interpreted as observational evidence for non-propagating pressure balanced structures, kinetic ion-acoustic waves, as well as the MHD slow-mode. Given the high damping rates of parallel propagating compressive fluctuations, their ubiquity in satellite observations is surprising and suggestive of a local driving process. One possible candidate for the generation of compressive fluctuations in the solar wind is the Alfven wave parametric instability. Here, we test the parametric decay process as a source of compressive waves in the solar wind by comparing the collisionless damping rates of compressive fluctuations with growth rates of the parametric decay instability daughter waves. Our results suggest that generation of compressive waves through parametric decay is overdamped at 1 au, but that the presence of slow-mode-like density fluctuations is correlated with the parametric decay of Alfven waves.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA18-08861S" target="_blank" >GA18-08861S: Plasma turbulence at ion scales in the solar wind</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal Letters

ISSN

2041-8213

e-ISSN

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Volume of the periodical

854

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

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UT code for WoS article

000426055900006

EID of the result in the Scopus database

2-s2.0-85047737260