[Loops] type II spicule paper

[Viggo Hansteen]

Yes, clearly. And the high energy tail of electrons accelerated in the chromosphere can easily be associated with type II spicules. Jim's theory is all wet in other words ;-)
And if you start believing in Scudders ideas on coronal heating through velocity filtration I've got a good deal on a bridge between Brooklyn and Manhattan I can recommend.

Best wishes,
Viggo

On Jul 31, 2012, at 18:57 , Petrus Martens wrote:

> On 7/31/12 10:42 AM, Charles C. Kankelborg wrote:
>> So, Anderson concluded that the velocity filtration model needed to be
>> redone with Coulomb collisions included. Dorelly and Scudder came back
>> in 2003 with a paper concluding that "the electron heat flux is
>> determined by the essentially collisionless high-energy tail" of the
>> distribution:
>> 
>> http://adsabs.harvard.edu/abs/2003JGRA..108.1294D
>> 
>> Does that mean the coulomb collisions don't really affect prediction of
>> energy 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,
> 
> Piet
> 
> 
>> 
>> Charles
>> 
>> 
>> On 2012 Jul 31, , at 9:27 AM, Dana Longcope wrote:
>> 
>>> Stephen Anderson did a very thorough analysis of how Coulomb
>>> collisions affect the model.
>>> 
>>> http://adsabs.harvard.edu/abs/1994ApJ...437..860A
>>> 
>>> dana
>>> 
>>> -----------------------------------------------------------
>>> Dana Longcope    |     Dept. of Physics
>>> Professor               |     Montana State University
>>> (406) 994-7851    |     Bozeman, MT 59717
>>>         dana at solar.physics.montana.edu
>>> 
>>> 
>>> 
>>> On Jul 31, 2012, at 9:20 AM, Petrus Martens wrote:
>>> 
>>>> 
>>>>>    Do you mean velocity filtration, where the corona is simply
>>>>> particles from the
>>>> tail of the chromospheric distribution function?  That theory has
>>>> been largely discredited.
>>>> 
>>>> That's news to me.  Do you have a reference?
>>>> 
>>>> Piet
>>>> 
>>>> 
>>>> 
>>>> <martens.vcf>_______________________________________________
>>>> Loops mailing list
>>>> Loops at solar.physics.montana.edu
>>>> https://mithra.physics.montana.edu/mailman/listinfo/loops
>>> 
>>> _______________________________________________
>>> Loops mailing list
>>> Loops at solar.physics.montana.edu
>>> https://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 else
>> Montana State University |  matters."
>> Bozeman, MT 59717        |
>> Phone: 406-994-7853      |                 --Jaroslav Pelikan
>> FAX:   406-994-4452      |
>> http://solar.physics.montana.edu/kankel/
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
> 

========================================================
Viggo H. Hansteen                                   http://www.astro.uio.no/~viggoh
Institutt for teoretisk astrofysikk               tel: +47-22856120
PB 1029, Blindern                                    fax: +47-22856505
N-0315 Oslo, Norway                              Viggo.Hansteen at astro.uio.no
========================================================

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mithra.physics.montana.edu/pipermail/loops/attachments/20120731/fac60ee4/attachment-0001.html>