On 7/31/12 10:42 AM, Charles C. Kankelborg wrote:So, Anderson concluded that the velocity filtration model needed to beredone with Coulomb collisions included. Dorelly and Scudder came backin 2003 with a paper concluding that "the electron heat flux isdetermined by the essentially collisionless high-energy tail" of thedistribution:http://adsabs.harvard.edu/abs/2003JGRA..108.1294DDoes that mean the coulomb collisions don't really affect prediction ofenergy transport? I haven't followed the trail of citations any farther...
Ah, now I remember! The mean-free-path for high energy electrons is of
the order of the loop length (has to be be; if it is longer there is
no coronal heating, if it is much shorter likewise). So chromospheric
electrons in some energy range will contribute to coronal heating. Now
the question is whether there will be enough of them.
Cheers,
PietCharlesOn 2012 Jul 31, , at 9:27 AM, Dana Longcope wrote:Stephen Anderson did a very thorough analysis of how Coulombcollisions affect the model.http://adsabs.harvard.edu/abs/1994ApJ...437..860Adana-----------------------------------------------------------Dana Longcope | Dept. of PhysicsProfessor | Montana State University(406) 994-7851 | Bozeman, MT 59717dana@solar.physics.montana.eduOn Jul 31, 2012, at 9:20 AM, Petrus Martens wrote:Do you mean velocity filtration, where the corona is simplyparticles from thetail of the chromospheric distribution function? That theory hasbeen largely discredited.That's news to me. Do you have a reference?Piet<martens.vcf>_______________________________________________Loops mailing listLoops@solar.physics.montana.eduhttps://mithra.physics.montana.edu/mailman/listinfo/loops_______________________________________________Loops mailing listLoops@solar.physics.montana.eduhttps://mithra.physics.montana.edu/mailman/listinfo/loops________________________________________________________________________Charles Kankelborg AC7NY |260C EPS Building | "If Christ is risen, nothing else matters.Physics Department | And if Christ is not risen --- nothing elseMontana State University | matters."Bozeman, MT 59717 |Phone: 406-994-7853 | --Jaroslav PelikanFAX: 406-994-4452 |http://solar.physics.montana.edu/kankel/