[Loops] Loop Working group @ Solar Cycle 24 Meeting, Napa

Fri Sep 19 12:53:35 MDT 2008

Dear Rob,

Thanks for the preview of the Napa meeting.
Regarding analyzing joint datasets I let you know on  what datasets
I am currently working, in case somebody else wants to work on those.

(1) May 9, 2007: This AR is the focus of 3 new STEREO papers and is
	already well-analyzed regarding geometry and DEM analysis.
	Any complementary data would be interesting.

170) Aschwanden,M.J., Wuelser,J.P., Nitta,N., and Lemen,J. 2008, The  
Astrophysical Journal, 679, 827-842
URL1="http://www.lmsal.com/~aschwand/eprints/2008_stereo1.pdf" -  
_loop3D.dat"
First 3D reconstructions of coronal loops with the STEREO A and B  
spacecraft: I. Geometry

Aschwanden,M.J., Nitta,N.V., Wuelser,J.P., and Lemen,J.R. 2008, The  
Astrophysical Journal, 680, 1477-1495
URL1="http://www.lmsal.com/~aschwand/eprints/2008_stereo2.pdf"
First 3D reconstructions of coronal loops with the STEREO A and B  
spacecraft: II. Electron Density and Temperature Measurements

Aschwanden,M.J., Wuelser,J.P., Nitta,N., Lemen,J., and Sandman, A.  
2008, The Astrophysical Journal, ... (subm)
URL1="http://www.lmsal.com/~aschwand/eprints/2008_stereo3.pdf" -  
_movies/"
First 3D reconstructions of coronal loops with the STEREO A and B  
spacecraft: III. Instant Stereoscopic Tomography of Active Regions

(2) Then I work also on the 10 M-class flares of June 2007 observed  
with STEREO/EUVI:http://secchi.lmsal.com/EUVI/work_euvi.txt

I work on hydrodynamic modeling of these flares, trying to reproduce

the light curves of GOES and EUVI.

(3) Joint data analysis of STEREO/EUVI, GOES, and HINODE flare:

2007 Jun 1, 06:40, GOES 1-B class flare, for which Harry Warren

already published Hinode data.

Let me know if you know anybody else working on these data,

perhaps we could coordinate some joint analysis.

Cheers,

Markus

On Sep 19, 2008, at 5:59 AM, Robert William Walsh wrote:

> Dear Loop-interested colleagues,
>
> This is an invitation to join us in the “Active Region Loop”
> Working Group at the meeting
>
>  “Solar activity during the onset of Solar Cycle 24”
> 8-12 December 2008
> The Embassy Suites Hotel in Napa, California
> Website: sprg.ssl.berkeley.edu/RHESSI/napa2008/index.php
>
> With five dedicated workshop sessions, we intend this meeting to be
> complementary to the very
> successful “Coronal Loop Meetings” that have held over the last few
> years.
>
> Building upon the wealth of observations from SOHO and TRACE, already
> Hinode and STEREO
> are providing new insights and novel views of active region loops that
> are both strengthening
> and challenging our current understanding of their fundamental nature.
> The torrent of data
> from the up-coming SDO mission will stretch further our current
> thinking on their basic make-up,
> how they are heated and their dynamic qualities. Given the above, this
> working group will
> address several key science themes associated with active region  
> loops.
> These will include
> (but not necessarily restricted to):
>
> 1. Physical properties: At current instrumental resolution, are the
> active region loops we
> observe isothermal or multi-thermal? Are they monolithic or
> multi-threaded? Will we ever be
> able to distinguish between these two paradigms?
>
> 2. Temporal properties: Is the heat input to loops steady or  
> impulsive?
> How can we use the
> techniques of coronal seismology in the Hinode/STEREO/SDO era?
>
> 3. Magnetic properties: Do we now truly have a 3D picture of active
> region loop topology?
> How well do current MHD models reproduce the magnetic structure of a
> "global" active region?
> On the other hand, how well do these models reproduce the local
> magnetic structure within
> an active region?
>
> Working on a common dataset:
> I would like to pursue the possibility of interested parties  
> working on
> a common dataset to
> compare various analysis techniques/approaches. This could be the  
> focus
> of one/two sessions.
>
> As a first suggestion, I would put forward the dates of 2nd-6th July
> 2007 based on the
> recent paper that Jane Noglik and I have submitted to Ap J. We have
> very much focussed
> on the global aspects of AR10961 but there is much more that could be
> examined.
>
> Taken as part of the of the Hinode Observing Programme (HOP) 018,  
> there
> are two active
> regions visible on the solar disc with coverage from TRACE (171
> Angstroms), STEREO EUVI,
> Hinode XRT and EIS and SOHO synoptic data. Our paper can be found at
>
> solar.physics.montana.edu/cgi-bin/eprint/index.pl?entry=7611
>
> though please note that it is going through the refereeing process as
> we speak!
>
> If you have other appropriate datasets that you would like to suggest
> for people to look at
> and work on, please email me (rwwalsh at uclan.ac.uk). Once I get
> responses back, I can
> put together put a web-based joint list.
>
> Finally, please register for the Napa meeting at
>
> sprg.ssl.berkeley.edu/RHESSI/napa2008/abstracts.php
>
> as soon as possible. This will not only help with the organization of
> this particular working
> group, but will also assist the overall organizers of the meeting in
> their preparation activities.
> You don’t necessarily have to pay the registration fee at this stage,
> but please indicate which
> working group(s) you will be joining and make your hotel reservations.
>
> Thanks and I hope to see you in Napa. Feel free to pass this along to
> anyone else who you
> believe would be interested in participating.
>
> Robert Walsh, leader – Active Region Loop Working Group
> Jeremiah Horrocks Institute for Astrophysics and Supercomputing,
> Universityof Central Lancashire,
> Preston, Lancashire,
> PR1 2 HE
> United Kingdom
>
> _______________________________________________
> Loops mailing list
> 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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