Dear Hugh,

Jim Klimchuk sent a great summary of the current status of a nanoflare model around,
so it deals with all the PROs. An outside reader who wants to hear both sides might be
interested to hear also the CONs, which you could find in the ApJ Letter entitled
"An observational test that disproves coronal nanoflare heating models" (Aschwanden
2008, ApJ 672, L135). The arguments made therein do not dismiss nanoflares
altogether, but come to the conclusion that they occur in the transition region,
rather than in the corona (as Parker originally suggested).

Cheers,
Markus


On Mar 3, 2009, at 7:32 AM, Klimchuk, James A. (GSFC-6710) wrote:

Dear loops friends,
 
     Here is a paper I wrote for the Hinode II conference proceedings.  In it, I try to do three things:  (1) review the arguments leading to the conclusion that warm EUV loops must by bundles of strands heated by storms of nanoflares (the flow chart some of you have asked about); (2) reconcile the isothermal/multi-thermal debate in terms of the duration of the nanoflare storm; and (3) address the possibility that loops can be explained by thermal nonequilibrium.  Comments are welcomed.
 
Thanks,
James A. Klimchuk

____________________________________________
Dr. Markus J. Aschwanden
Solar & Astrophysics Laboratory
Lockheed Martin Advanced Techology Center
Org. ADBS, Bldg. 252
3251 Hanover St., Palo Alto, CA 94304, USA
Phone: 650-424-4001, FAX: 650-424-3994
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