Evidence for Impulsive Heating of Active Region Coronal Loops

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dc.contributor.advisorBradshaw, Stephenen_US
dc.contributor.committeeMemberAlexander, Daviden_US
dc.contributor.committeeMemberEcklund, Karlen_US
dc.creatorReep, Jeffreyen_US
dc.date.accessioned2013-07-24T19:46:12Zen_US
dc.date.accessioned2013-07-24T19:46:17Zen_US
dc.date.available2013-07-24T19:46:12Zen_US
dc.date.available2013-07-24T19:46:17Zen_US
dc.date.created2012-12en_US
dc.date.issued2013-07-24en_US
dc.date.submittedDecember 2012en_US
dc.date.updated2013-07-24T19:46:18Zen_US
dc.description.abstractWe present observational and numerical evidence supporting the theory of impulsive heating of the solar corona. We have run numerical simulations solving the hydrodynamic equations for plasma confined to a magnetic flux tube, for the two distinct cases of steady and impulsive heating. We find that steady heating cannot explain the observed amount of low-temperature plasma in active regions on the sun. The results for impulsive heating closely match those of the observations. The ratio of heating time to cooling time predominantly determines the observed temperature distribution of the plasma. We have also identified an observational bias in calculating intensities of spectral lines in previous studies, which causes an under-estimation of low-temperature plasma. We predict Doppler shifts in the observed line emission that are in agreement with observations, and which may serve as a diagnostic of the strength of heating. We conclude that impulsive heating of active region coronal loops is more likely than steady heating.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationReep, Jeffrey. "Evidence for Impulsive Heating of Active Region Coronal Loops." (2013) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/71685">https://hdl.handle.net/1911/71685</a>.en_US
dc.identifier.slug123456789/ETD-2012-12-220en_US
dc.identifier.urihttps://hdl.handle.net/1911/71685en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectSolar physicsen_US
dc.subjectCoronal physicsen_US
dc.subjectSolar atmosphereen_US
dc.subjectCoronal heatingen_US
dc.subjectCoronal loopsen_US
dc.subjectActive regionsen_US
dc.subjectImpulsive heatingen_US
dc.subjectEmission measureen_US
dc.subjectDoppler shiftsen_US
dc.subjectCoronaen_US
dc.subjectRice Universityen_US
dc.subjectAstrophysicsen_US
dc.titleEvidence for Impulsive Heating of Active Region Coronal Loopsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentPhysics and Astronomyen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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