ENTHALPY-BASED THERMAL EVOLUTION OF LOOPS. II. IMPROVEMENTS TO THE MODEL

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dc.citation.journalTitleThe Astrophysical Journalen_US
dc.citation.volumeNumber752en_US
dc.contributor.authorCargill, P.J.en_US
dc.contributor.authorBradshaw, S.J.en_US
dc.contributor.authorKlimchuk, J.A.en_US
dc.date.accessioned2013-03-13T18:49:03Zen_US
dc.date.available2014-03-19T05:10:03Zen_US
dc.date.issued2012en_US
dc.description.abstractThis paper develops the zero-dimensional (0D) hydrodynamic coronal loop model ﾓEnthalpy-based Thermal Evolution of Loopsﾔ (EBTEL) proposed by Klimchuk et al., which studies the plasma response to evolving coronal heating, especially impulsive heating events. The basis of EBTEL is the modeling of mass exchange between the corona and transition region (TR) and chromosphere in response to heating variations, with the key parameter being the ratio of the TR to coronal radiation. We develop new models for this parameter that now include gravitational stratification and a physically motivated approach to radiative cooling. A number of examples are presented, including nanoflares in short and long loops, and a small flare. The new features in EBTEL are important for accurate tracking of, in particular, the density. The 0D results are compared to a 1D hydro code (Hydrad) with generally good agreement. EBTEL is suitable for general use as a tool for (1) quick-look results of loop evolution in response to a given heating function, (2) extensive parameter surveys, and (3) situations where the modeling of hundreds or thousands of elemental loops is needed. A single run takes a few seconds on a contemporary laptop.en_US
dc.embargo.terms1 yearen_US
dc.identifier.citationCargill, P.J., Bradshaw, S.J. and Klimchuk, J.A.. "ENTHALPY-BASED THERMAL EVOLUTION OF LOOPS. II. IMPROVEMENTS TO THE MODEL." <i>The Astrophysical Journal,</i> 752, (2012) The American Astronomical Society: http://dx.doi.org/10.1088/0004-637X/752/2/161.en_US
dc.identifier.doihttp://dx.doi.org/10.1088/0004-637X/752/2/161en_US
dc.identifier.urihttps://hdl.handle.net/1911/70564en_US
dc.language.isoengen_US
dc.publisherThe American Astronomical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.subject.keywordsunen_US
dc.subject.keywordactivity - Sunen_US
dc.subject.keywordcorona - Sunen_US
dc.subject.keywordflares - Sunen_US
dc.subject.keywordtransition regionen_US
dc.titleENTHALPY-BASED THERMAL EVOLUTION OF LOOPS. II. IMPROVEMENTS TO THE MODELen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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