Plasma Flows in the Cool Loop Systems
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43900781" target="_blank" >RIV/60076658:12310/19:43900781 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.3847/1538-4357/ab06f5/pdf" target="_blank" >https://iopscience.iop.org/article/10.3847/1538-4357/ab06f5/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ab06f5" target="_blank" >10.3847/1538-4357/ab06f5</a>
Alternative languages
Result language
angličtina
Original language name
Plasma Flows in the Cool Loop Systems
Original language description
We study the dynamics of low-lying cool loop systems for three data sets as observed by the Interface Region Imaging Spectrograph. Radiances, Doppler shifts, and line widths are investigated in and around observed cool loop systems using various spectral lines formed between the photosphere and transition region (TR). Footpoints of the loop threads are either dominated by blueshifts or redshifts. The cospatial variation of velocity above the blueshifted footpoints of various loop threads shows a transition from very small upflow velocities ranging from (-1 to +1) -1 in the Mg ii k line (2796.20 formation temperature: ) to the high upflow velocities from (-10 to -20) -1 in Si iv. Thus, the transition of the plasma flows from redshift (downflows) to blueshift (upflows) is observed above the footpoints of these loop systems in the spectral line C ii (1334.53 log(T/) ,F= ,F4.3) lying between Mg ii k and Si iv (1402.77). This flow inversion is consistently observed in all three sets of the observational data. The other footpoint of the loop system always remains redshifted, indicating downflowing plasma. The multispectral line analysis in the present paper provides a detailed scenario of the plasma flow's inversions in cool loop systems leading to the mass transport and their formation. The impulsive energy release due to small-scale reconnection above the loop footpoint seems to be the most likely cause for sudden initiation of the plasma flows evident at TR temperatures. © 2019. The American Astronomical Society. All rights reserved..
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/EF16_027%2F0008364" target="_blank" >EF16_027/0008364: Development of USB - International mobility</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
874
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
16
Pages from-to
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UT code for WoS article
000462047700014
EID of the result in the Scopus database
2-s2.0-85064437540