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

Result code in 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>

Alternative codes found

RIV/67985815:_____/12:00388116

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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%).

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

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

Name of the periodical

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Volume of the periodical

540

Issue of the periodical within the volume

duben

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

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UT code for WoS article

000303315400102

EID of the result in the Scopus database

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