Fourier Analysis of Radio Bursts Observed with Very High Time Resolution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F15%3A00445043" target="_blank" >RIV/67985815:_____/15:00445043 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11207-014-0599-2" target="_blank" >http://dx.doi.org/10.1007/s11207-014-0599-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11207-014-0599-2" target="_blank" >10.1007/s11207-014-0599-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fourier Analysis of Radio Bursts Observed with Very High Time Resolution

Popis výsledku v původním jazyce

We analyze the power-spectrum parameters and variability for two millisecond radio dm-spike events and one drifting pulsation structure (DPS) event, for which the structures of the recorded signals were analyzed with an effective time resolution of 0.0008 s in five adjacent frequency bands of their radio spectra. We found that Fourier spectral indices varied rapidly when radio fine structures were recorded. Otherwise they remained close to zero, indicating the presence of noise. For the 10 -aEuro partsper thousand 40 Hz frequency interval of the power spectra the mean values of the Fourier spectral indices varied up to -1.51 for the dm-spikes and up to -1.53 for the DPS event. Cross-correlation coefficients of radio fluxes in adjacent frequency bandsvaried between 0.12 and 0.60 for dm-spikes and between 0.77 and 0.94 for the DPS event. The shortest fine structure found in the studied events lasted 0.001 s. These results are entirely new for dm-radio spikes and confirm a single previo

Název v anglickém jazyce

Fourier Analysis of Radio Bursts Observed with Very High Time Resolution

Popis výsledku anglicky

We analyze the power-spectrum parameters and variability for two millisecond radio dm-spike events and one drifting pulsation structure (DPS) event, for which the structures of the recorded signals were analyzed with an effective time resolution of 0.0008 s in five adjacent frequency bands of their radio spectra. We found that Fourier spectral indices varied rapidly when radio fine structures were recorded. Otherwise they remained close to zero, indicating the presence of noise. For the 10 -aEuro partsper thousand 40 Hz frequency interval of the power spectra the mean values of the Fourier spectral indices varied up to -1.51 for the dm-spikes and up to -1.53 for the DPS event. Cross-correlation coefficients of radio fluxes in adjacent frequency bandsvaried between 0.12 and 0.60 for dm-spikes and between 0.77 and 0.94 for the DPS event. The shortest fine structure found in the studied events lasted 0.001 s. These results are entirely new for dm-radio spikes and confirm a single previo

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

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Solar Physics

ISSN

0038-0938

e-ISSN

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Svazek periodika

290

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

169-180

Kód UT WoS článku

000346057000011

EID výsledku v databázi Scopus

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