Plasma flows and sound-speed perturbations in the average supergranule

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548144" target="_blank" >RIV/67985815:_____/21:00548144 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/21:10436446
Result on the web
<a href="https://doi.org/10.1051/0004-6361/202039928" target="_blank" >https://doi.org/10.1051/0004-6361/202039928</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202039928" target="_blank" >10.1051/0004-6361/202039928</a>

Result language
angličtina
Original language name
Plasma flows and sound-speed perturbations in the average supergranule
Original language description
Our aim is to construct the model of the flows in the average supergranular cell using fully consistent time-distance inverse methodology. We found near-surface divergent horizontal flows which quickly and monotonously weakened with depth, they became particularly weak at the depth of about 7 Mm, where they even apparently switched sign. The amplitude of the 'reversed' flow was comparable to the background flows. The inverted vertical flows and sound-speed perturbations were spoiled by unknown systematic errors. To learn about the vertical component, we integrated the continuity equation from the surface. The derived estimates of the vertical flow depicted a sub-surface increase from about 5 m s(-1) at the surface to about 35 m s(-1) at the depth of about 3 Mm followed by a monotonous decrease to greater depths. The vertical flow remained positive (an upflow) and became indistinguishable from the background at the depth of about 15 Mm. We further detected a systematic flow in the longitudinal direction. The course of this systematic flow with depth agrees well with the model of the solar rotation in the sub-surface layers.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA18-06319S" target="_blank" >GA18-06319S: Evolution of sunspots and active regions</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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