Statistical Moments of Active-Region Images During Solar Flares

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F14%3A00399766" target="_blank" >RIV/67985815:_____/14:00399766 - isvavai.cz</a>

Alternative codes found

RIV/67985556:_____/14:00399766

Result on the web

<a href="http://dx.doi.org/10.1007/s11207-013-0334-4" target="_blank" >http://dx.doi.org/10.1007/s11207-013-0334-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11207-013-0334-4" target="_blank" >10.1007/s11207-013-0334-4</a>

Result language

angličtina

Original language name

Statistical Moments of Active-Region Images During Solar Flares

Original language description

We present new temporal-evolution diagnostics of solar flares. The high-order statistical moments (skewness and kurtosis) of the H? images of active regions during solar flares were computed from their initial phases up to their maxima. The same method was used for quiet active regions for tests and comparison. We found that temporal profiles of the H? statistical moments during flares roughly correspond to those observed in soft X-rays by the GOES satellite. Maxima of the cross-correlation coefficientsbetween the skewness and the GOES X-rays were found to be 0.82???0.98, and the GOES X-rays are delayed 0???144 seconds against the skewness. We recognized that these moments are very sensitive to pre-flare activities. Therefore we used them to determinethe flare starting-time and to study the pre-flare quasi-periodic processes. We determined the periods of these pre-flare processes in an interval of 20???400 seconds by using special convolution filters and Fourier analysis. We propose

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

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

Name of the periodical

Solar Physics

ISSN

0038-0938

e-ISSN

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Volume of the periodical

289

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

193-209

UT code for WoS article

000327094700013

EID of the result in the Scopus database

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