<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]--><o:SmartTagType
namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="place"/>
<!--[if !mso]>
<style>
st1\:*{behavior:url(#default#ieooui) }
</style>
<![endif]-->
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"\@MS Mincho";
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";
color:black;}
h1
{mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:24.0pt;
font-family:"Times New Roman";
color:black;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
pre
{margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:Arial;
color:navy;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor=white lang=EN-US link=blue vlink=blue>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Alan, in reply to you: The Japanese have
chosen “Plan B” for the Solar-C mission, and according to Saku
Tsuneta, they are moving forward with the project in spite of the horrible
disaster they must deal with. Plan B is a high spatial and spectral
resolution imaging/spectrometer (~0.2”) involving two instruments and a
very high spatial resolution EUV/UV imager. The combination covers the
entire atmosphere from the chromosphere to X-ray solar flares (see white paper
to the <st1:country-region w:st="on"><st1:place w:st="on">US</st1:place></st1:country-region>
decadal survey). So Solar-C, if approved by funding agencies and
implemented, should clarify a lot of the issues dealing with loops and how they
are heated.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In addition, there is the Lockheed SMEX
IRIS mission undergoing development, and there are also a number of interesting
rocket experiments either under construction or proposed.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>To the group: Please add whatever else I
may have overlooked.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>George Doschek<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> loops-bounces@mithra.physics.montana.edu
[mailto:loops-bounces@mithra.physics.montana.edu] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Alan Gabriel<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, June 09, 2011 7:56
AM<br>
<b><span style='font-weight:bold'>To:</span></b> A mailing list for scientists
involved in the observation and modeling ofsolar loop structures<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Loops] [1106.1591]
Solar Dynamics Observatory discovers thin high temperature strands in coronal
active regions</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>A nice paper and an important contribution to the
debate. But the jury is still out. We may never resolve this without real
spectroscopic evidence of the very hot component. Where is our future
spectroscopy coming from??<br>
<br>
Alan Gabriel<br>
<br>
<br>
Le 09/06/2011 10:52, Fabio Reale a écrit : <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Dear colleagues<br>
please find at the following link the preprint of a work
accepted for publication on the ApJ Letters, showing new strong evidence of
finely-structured loops with impulsive nanoflare activity in active regions:<br>
<br>
<a href="http://arxiv.org/abs/1106.1591" moz-do-not-send=true>http://arxiv.org/abs/1106.1591</a><br>
<br>
The abstract is below.<br>
<br>
Best regards<br>
Fabio Reale<o:p></o:p></span></font></p>
<h1><b><font size=3 color=black face="Times New Roman"><span style='font-size:
12.0pt'>Solar Dynamics Observatory discovers thin high temperature strands in
coronal active regions</span></font><o:p></o:p></b></h1>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><span class=descriptor><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>Authors:</span></font></span>
Fabio Reale, Massimiliano Guarrasi, Paola Testa, Edward E. DeLuca, Giovanni<br>
Peres, Leon Golub<o:p></o:p></p>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal><span class=descriptor><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Abstract:</span></font></span>
One scenario proposed to explain the million degrees solar corona is a
finely-stranded corona where each strand is heated by a rapid pulse. However,
such fine structure has neither been resolved through direct imaging
observations nor conclusively shown through indirect observations of extended
superhot plasma. Recently it has been shown that the observed difference in
appearance of cool and warm coronal loops (~1 MK, ~2-3 MK, respectively) --
warm loops appearing "fuzzier" than cool loops -- can be explained by
models of loops composed of subarcsecond strands, which are impulsively heated
up to ~10 MK. That work predicts that images of hot coronal loops (>~6 MK)
should again show fine structure. Here we show that the predicted effect is
indeed widely observed in an active region with the Solar Dynamics Observatory,
thus supporting a scenario where impulsive heating of fine loop strands plays
an important role in powering the active corona. <o:p></o:p></p>
</blockquote>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><fieldset class="mimeAttachmentHeader"></fieldset><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Loops mailing list<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="mailto:Loops@solar.physics.montana.edu">Loops@solar.physics.montana.edu</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="https://mithra.physics.montana.edu/mailman/listinfo/loops">https://mithra.physics.montana.edu/mailman/listinfo/loops</a><o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-- <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>______________________________________________________________________<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Alan GABRIEL <a
href="mailto:alan.gabriel@ias.u-psud.fr">alan.gabriel@ias.u-psud.fr</a> <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Institut d'Astrophysique Spatiale tel : (33) 1 69 85 85 10<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Batiment 121, Universite Paris XI fax : (33) 1 69 85 86 75<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>91405 ORSAY Cedex mobile : (33) 6 72 14 23 89<o:p></o:p></span></font></pre><pre><st1:country-region
w:st="on"><st1:place w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>France</span></font></st1:place></st1:country-region> <o:p></o:p></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_____________________________________________________________________<o:p></o:p></span></font></pre></div>
</body>
</html>