The heating of the solar corona is one of the big questions in astrophysics. Rapid pulses called nanoflares are among the best candidate mechanisms. The analysis of the time variability of coronal X-ray emission is potentially a very useful tool to detect impulsive events. We analyze the small-scale variability of a solar active region in a high cadence Hinode/XRT observation. The dataset allows us to detect very small deviations of emission fluctuations from the distribution expected for a constant rate. We discuss the deviations in the light of the pulsed-heating scenario.
Terzo, S., Reale, F., Miceli, M., Kano, R., Tsuneta, S., Klimchuk, J.A. (2012). Nanoflare Evidence from Analysis of the X-Ray Variability of an Active Region Observed with Hinode/XRT. In 4th Hinode Science Meeting: Unsolved Problems and Recent Insights (pp.245-250). San Francisco : Astronomical Society of the Pacific.
Nanoflare Evidence from Analysis of the X-Ray Variability of an Active Region Observed with Hinode/XRT
TERZO, Sergio;REALE, Fabio;MICELI, Marco;
2012-01-01
Abstract
The heating of the solar corona is one of the big questions in astrophysics. Rapid pulses called nanoflares are among the best candidate mechanisms. The analysis of the time variability of coronal X-ray emission is potentially a very useful tool to detect impulsive events. We analyze the small-scale variability of a solar active region in a high cadence Hinode/XRT observation. The dataset allows us to detect very small deviations of emission fluctuations from the distribution expected for a constant rate. We discuss the deviations in the light of the pulsed-heating scenario.File | Dimensione | Formato | |
---|---|---|---|
245.pdf
accesso aperto
Descrizione: main article
Dimensione
191.57 kB
Formato
Adobe PDF
|
191.57 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.