Scale-dependent Polarization of Solar Wind Velocity Fluctuations at the Inertial and Kinetic Scales
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10389489" target="_blank" >RIV/00216208:11320/19:10389489 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9FCUHFoMS_" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9FCUHFoMS_</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/aaf239" target="_blank" >10.3847/1538-4357/aaf239</a>
Alternative languages
Result language
angličtina
Original language name
Scale-dependent Polarization of Solar Wind Velocity Fluctuations at the Inertial and Kinetic Scales
Original language description
We study the polarization properties of the velocity fluctuations in solar wind turbulence using high-resolution data from the Spektr-R spacecraft. The ratio of perpendicular to parallel velocity fluctuations in the inertial range is smaller than the equivalent ratio for magnetic fluctuations, but gradually increases throughout this range. In the kinetic range, there is a large decrease in the ratio, similar to the magnetic fluctuations. We compare the measurements to numerical solutions for a combination of kinetic Alfven waves and slow waves, finding that both the slow increase and sharp decrease in the ratio are consistent with a majority population of Alfven waves and minority population of slow waves in critical balance. Furthermore, the beta-dependence of this scale-dependent ratio can be successfully captured in the model when incorporating a beta-dependent Alfven to slow wave ratio similar to that observed in the solar wind.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/GA16-04956S" target="_blank" >GA16-04956S: Solar wind as a natural laboratory: structure, turbulence, and shocks.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
0004-637X
e-ISSN
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Volume of the periodical
870
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
40
UT code for WoS article
000455126900001
EID of the result in the Scopus database
2-s2.0-85059832849