Quasi full-disk maps of solar horizontal velocities using SDO/HMI data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10128767" target="_blank" >RIV/00216208:11320/12:10128767 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985815:_____/12:00388116

Výsledek na webu

<a href="http://dx.doi.org/10.1051/0004-6361/201118678" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201118678</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201118678" target="_blank" >10.1051/0004-6361/201118678</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quasi full-disk maps of solar horizontal velocities using SDO/HMI data

Popis výsledku v původním jazyce

Aims. For the first time, the motion of granules (solar plasma on the surface on scales larger than 2.5 Mm) has been followed over the entire visible surface of the Sun, using SDO/HMI white-light data. Methods. Horizontal velocity fields are derived fromimage correlation tracking using a new version of the coherent structure tracking algorithm. The spatial and temporal resolutions of the horizontal velocity map are 2.5 Mm and 30 min, respectively. Results. From this reconstruction, using the multi-resolution analysis, one can obtain to the velocity field at different scales with its derivatives such as the horizontal divergence or the vertical component of the vorticity. The intrinsic error on the velocity is similar to 0.25 km s(-1) for a time sequence of 30 min and a mesh size of 2.5 Mm. This is acceptable compared to the granule velocities, which range between 0.3 km s(-1) and 1.8 km s(-1). A high correlation between velocities computed from Hinode and SDO/HMI has been found (85%).

Název v anglickém jazyce

Quasi full-disk maps of solar horizontal velocities using SDO/HMI data

Popis výsledku anglicky

Aims. For the first time, the motion of granules (solar plasma on the surface on scales larger than 2.5 Mm) has been followed over the entire visible surface of the Sun, using SDO/HMI white-light data. Methods. Horizontal velocity fields are derived fromimage correlation tracking using a new version of the coherent structure tracking algorithm. The spatial and temporal resolutions of the horizontal velocity map are 2.5 Mm and 30 min, respectively. Results. From this reconstruction, using the multi-resolution analysis, one can obtain to the velocity field at different scales with its derivatives such as the horizontal divergence or the vertical component of the vorticity. The intrinsic error on the velocity is similar to 0.25 km s(-1) for a time sequence of 30 min and a mesh size of 2.5 Mm. This is acceptable compared to the granule velocities, which range between 0.3 km s(-1) and 1.8 km s(-1). A high correlation between velocities computed from Hinode and SDO/HMI has been found (85%).

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Svazek periodika

540

Číslo periodika v rámci svazku

duben

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000303315400102

EID výsledku v databázi Scopus

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