[Loops] EIS AR Loops - Tripathi et al, 2009, ApJ

[Inigo Arregui]

Dear Markus,

I am gratified that you find me dazzling...I mean that
you find the paper dazzling! Most credit goes to Durgesh
who did all the hard work. As you and others must appreciate,
working with spectroscopic data is non-trivial. Hinode/EIS
is a great instrument, but the observations require a lot
of careful and meticulous analysis. We are looking forward
to the rise of the next solar cycle when we can pursue
some more observations of active regions. So far, we have just
had a 'taster'.

Thanks for the reference. We look forward to some animated
discussions at the Loops meeting in Firenze!

Best wishes,
helen

On Jan 6 2009, Markus J. Aschwanden wrote:

> Helen et al,
>
> Congratulations to the new dazzling Hinode paper!
>
> On the same note, from the statistics of some 18,000 loop widths
> measurements in the 3 TRACE filters we found a slight dependence
> that loops become wider (or fuzzier) with temperatures, i.e.,
>
> 	w(T) ~ T^(1.3+/-0.7)
>
> (see Aschwanden, Nightingale, & Boerner 2007, ApJ 656, 577).
> So loops at T=2 MK are about a factor of 3 fatter than at T=1 MK.
> The inferred coronal filling factors vary also slightly with
> temperature,
> from q~0.74 at T=1 MK to q~0.32 at T=2 MK, which goes along the
> lines Leon suggests.
>
> Cheers,
> Markus
>
>
> On Jan 6, 2009, at 1:08 PM, reale at astropa.unipa.it wrote:
>
>> I agree with Leon, but I also think that the paper only certifies
>> that the
>> loops look fuzzier in hotter lines. There may be no real  
>> contradiction
>> with Leon's perspective. Of course, we all sustain Leon's new imager.
>> Ciao
>> Fabio
>>
>>> Helen et al.,
>>>
>>> I can't let this go uncommented. Even though this paper was
>>> accepted (I know, I was the editor) I disagree with the conclusion
>>> that hot loops are fuzzier. Yes, that's what you see, but it is
>>> also explainable if the hot parts of the AR have many fine threads
>>> (unresolved at present resolution) with a large filling factor.
>>> That as the conclusion Joan and I came to from analyzing 284A
>>> data.
>>>
>>> Anyway, this won't be settled until we fly an imager with higher
>>> resolution. We're proposing one this year and I'm hoping we get
>>> the chance to clear this up, finally.
>>> Cheers,
>>>
>>> Leon
>>> _______________________________________________
>>> Loops mailing list
>>> Loops at solar.physics.montana.edu
>>> https://mithra.physics.montana.edu/mailman/listinfo/loops
>>>
>>
>>
>> _______________________________________________
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>> Loops at solar.physics.montana.edu
>> https://mithra.physics.montana.edu/mailman/listinfo/loops
>
> ____________________________________________
> 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
> URL: http://www.lmsal.com/~aschwand/
> e-mail: aschwanden at lmsal.com
> _______________________________________
> ____________________________________
>
>
>
>
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