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Titolo: On the reliability of peak-flux distributions, with an application to solar flares
Autore: Isliker, H; Benz, AO;
- Indirizzi:
- Univ Thessaloniki, Dept Phys, Sect Astrophys Astron & Mech, GR-54006 Salonika, Greece Univ Thessaloniki Salonika Greece GR-54006 ch, GR-54006 Salonika, Greece ETH Zentrum, Inst Astron, CH-8092 Zurich, Switzerland ETH Zentrum ZurichSwitzerland CH-8092 tron, CH-8092 Zurich, Switzerland
- Titolo Testata:
- ASTRONOMY & ASTROPHYSICS
fascicolo: 3,
volume: 375,
anno: 2001,
pagine: 1040 - 1048
- SICI:
- 1432-0746(200109)375:3<1040:OTROPD>2.0.ZU;2-N
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- RADIO SPIKES; FREQUENCY-DISTRIBUTIONS; STATISTICAL FLARE; BURSTS; AVALANCHES; FRAGMENTATION; VARIABILITY; NANOFLARES;
- Keywords:
- acceleration of particles; methods : statistical; Sun : flares; Sun : corona; Sun : radio radiation;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 25
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Isliker, H Univ Thessaloniki, Dept Phys, Sect Astrophys Astron & Mech, GR-54006 Salonika, Greece Univ Thessaloniki Salonika Greece GR-54006 6 Salonika, Greece
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- Citazione:
- H. Isliker e A.O. Benz, "On the reliability of peak-flux distributions, with an application to solar flares", ASTRON ASTR, 375(3), 2001, pp. 1040-1048
Abstract
Narrow-band radio spikes have been recorded during a solar are with unprecedented resolution. This unique example allows us to study the effect of low resolution in previously published peak-flux distributions of radio spikes. We give a general, analytical expression for how an actual peak-flux distribution is changed in shape if the peaks are determined with low temporaland/or frequency resolution. It turns out that, generally, low resolution tends to cause an exponential behavior at large flux values if the actual distribution is of a power-law shape. The distribution may be severely altered if the burst-duration depends on the peak-flux. The derived expression is applicable also to peak-flux distributions derived at other wavelengths (e.g. soft and hard X-rays, EUV). We show that for the analyzed spike-event the resolution was sufficient for a reliable peak flux distribution. It canbe fitted by generalized power-laws or by an exponential.
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Documento generato il 20/06/13 alle ore 05:05:57