Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasj...55.1025k&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.55, No.5, pp. 1025-1031
Astronomy and Astrophysics
Astronomy
10
Sun: Activity, Sun: Corona, Sun: X-Rays, Gamma Rays
Scientific paper
Coronal X-ray emission observed with the Yohkoh Soft X-ray Telescope (SXT) fluctuates with an amplitude larger than the Poisson photon noise, as shown in our previous paper (Katsukawa, Tsuneta 2001, ApJ, 557, 343). This fluctuation is attributed to small energy events (``nanoflares'') that cannot be identified as individual bursts. We present here a detailed analysis of the fluctuation, particularly concerning the spatial and temporal extents of the fluctuating sources. A macro-pixel analysis of the intensity fluctuation reveals that the spatial extent of the fluctuation is a few pixels of SXT. The scale size may be due to the point-spread function of SXT, and/or indicates the intrinsic size of the fluctuating source. An auto-correlation analysis gives a loose upper limit of the time scale, 1 minute. Taking into account the spatial and temporal scales, the energy of nanoflares estimated in the previous paper is updated to be 1022 to 1022 erg.
No associations
LandOfFree
Spatial and Temporal Extent of Solar Nanoflares and Their Energy Range does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spatial and Temporal Extent of Solar Nanoflares and Their Energy Range, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatial and Temporal Extent of Solar Nanoflares and Their Energy Range will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1034905