0000000000116416
AUTHOR
Saku Tsuneta
The X-Ray Telescope (XRT) for the Hinode Mission
著者人数：29名
Widespread Nanoflare Variability Detected with Hinode/X-Ray Telescope in a Solar Active Region
It is generally agreed that small impulsive energy bursts called nanoflares are responsible for at least some of the Sun's hot corona, but whether they are the explanation for most of the multimillion-degree plasma has been a matter of ongoing debate. We present here evidence that nanoflares are widespread in an active region observed by the X-Ray Telescope on board the Hinode mission. The distributions of intensity fluctuations have small but important asymmetries, whether taken from individual pixels, multipixel subregions, or the entire active region. Negative fluctuations (corresponding to reduced intensity) are greater in number but weaker in amplitude, so that the median fluctuation i…