Plasma flows and sound-speed perturbations in the average supergranule

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10436446

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Plasma flows and sound-speed perturbations in the average supergranule

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Plasma flows and sound-speed perturbations in the average supergranule

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA18-06319S" target="_blank" >GA18-06319S: Vývoj slunečních skvrn a aktivních oblastí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

646

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

13

Strana od-do

A184

Kód UT WoS článku

000623243000001

EID výsledku v databázi Scopus

2-s2.0-85101503958