Observation of Small-amplitude Electromagnetic Cyclotron Waves in the Solar Wind
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475704" target="_blank" >RIV/00216208:11320/23:10475704 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TEklUjJ85F" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TEklUjJ85F</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1674-4527/acc156" target="_blank" >10.1088/1674-4527/acc156</a>
Alternative languages
Result language
angličtina
Original language name
Observation of Small-amplitude Electromagnetic Cyclotron Waves in the Solar Wind
Original language description
Our previous studies on low-frequency electromagnetic cyclotron waves (ECWs) with amplitudes larger than 0.1 nT in the solar wind revealed that the left-handed (LH) polarized ECWs are the dominant waves, and these waves preferentially occur in plasma conditions of high proton speed (V ( p )), high proton temperature (T ( p )), low proton density (N ( p )). In the present study, using magnetic field and plasma data from the Wind mission between 2005 and 2015, we perform a survey of small-amplitude ECWs with amplitudes smaller than 0.1 nT. It is revealed for the first time that the small-amplitude right-handed (RH) polarized ECWs tend to frequently occur in plasmas characterized by low V ( p ), low T ( p ), low N ( p ), although the small-amplitude LH ECWs still preferentially occur in plasma conditions similar to the LH ECWs with amplitudes larger than 0.1 nT. Further investigation shows that the occurrences of small-amplitude RH ECWs and long-lasting radial interplanetary magnetic field (lrIMF) share the similar preferential plasma conditions of low T ( p ) and low N ( p ). During lrIMF events, in particular, the occurrence rates of RH and LH ECWs are comparable, with the occurrence rate of small-amplitude RH ECWs slightly larger than that of small-amplitude LH ECWs. The generation mechanism of the small-amplitude ECWs is discussed.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Research in Astronomy and Astrophysics
ISSN
1674-4527
e-ISSN
2397-6209
Volume of the periodical
23
Issue of the periodical within the volume
4
Country of publishing house
CN - CHINA
Number of pages
9
Pages from-to
045009
UT code for WoS article
000960031000001
EID of the result in the Scopus database
2-s2.0-85152210331