Jim,
I find your paper a more convincing than Hugh. Still, a TRACE image or two to illustrate the morphology of the actual corona would be helpful.
Also, using "high frequency nanoflare" (or similar variants) as a synonym for "steady heating" is invariably confusing.
Finally, how much low temperature emission (less than ~ 5.5, for example) does the nanoflare model predict? If loops are cooling all of the way down we should see some transition region emission in the corona all the time over active regions. This seems like an analog of the "insufficient observed coronal rain" problem. Of course, it might be too faint to see considering how bright the transition region on the disk is.
Harry
On 12/5/09 7:04 AM, "Klimchuk, James A. (GSFC-6710)" james.a.klimchuk@nasa.gov wrote:
Dear Loops Friends,
If you are interested, the attached paper shows that coronal loops cannot
be explained by thermal nonequilibrium. The results appear to rule out the widespread existence of coronal heating that is both highly concentrated low in the corona and steady or quasi-steady (slowly varying or impulsive with a rapid cadence). Comments are welcomed.
Best wishes, Jim
** James A. Klimchuk NASA Goddard Space Flight Center Solar Physics Lab, Code 671 Bldg. 21, Rm. 158 Greenbelt, MD 20771 USA
Phone: 1-301-286-9060 Fax: 1-301-286-7194 E-mail: James.A.Klimchuk@nasa.gov mailto:James.A.Klimchuk@nasa.gov Home page: http://hsd.gsfc.nasa.gov/staff/bios/cs/James_Klimchuk.html http://hsd.gsfc.nasa.gov/staff/bios/cs/James_Klimchuk.html
**