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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Hi Loops friends,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Attached is a paper just accepted by Solar Physics entitled "The Distinction Between Thermal Nonequilibrium and Thermal Instability," a topic which has caused some confusion.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Abstract:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">For some forms of steady heating, coronal loops are in a state of thermal nonequilibrium and evolve in a manner that includes accelerated cooling, often resulting in the formation of a cold condensation.
This is frequently confused with thermal instability, but the two are in fact fundamentally different. We explain the distinction and discuss situations where they may be interconnected. Large-amplitude perturbations, perhaps associated with MHD waves, likely
play a role in explaining phenomena that have been attributed to thermal nonequilibrium but also seem to require cross-field communication.</span><span style="font-family:"Arial",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Best wishes,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Jim<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">********************************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">James A. Klimchuk<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">NASA Goddard Space Flight Center<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Solar Physics Lab, Code 671<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Bldg. 21, Rm. 158<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Greenbelt, MD 20771<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">USA<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Phone: 1-301-286-9060<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Fax: 1-301-286-7194<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">E-mail: <a href="mailto:James.A.Klimchuk@nasa.gov"><span style="color:blue">James.A.Klimchuk@nasa.gov</span></a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Homepage: <a href="http://science.gsfc.nasa.gov/sed/index.cfm?fuseAction=people.jumpBio&&iPhonebookId=15844">
<span style="color:windowtext;text-decoration:none">http://science.gsfc.nasa.gov/sed/bio/james.a.klimchuk</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">No endorsement by NASA is implied for any correspondence related to my official role in professional organizations.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">********************************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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