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dc.contributor.authorBrannon, Sean R.
dc.date.accessioned2017-04-13T19:04:40Z
dc.date.available2017-04-13T19:04:40Z
dc.date.issued2016-12
dc.identifier.citationBrannon, Sean R. "OBSERVATION AND ANALYSIS OF BALLISTIC DOWNFLOWS IN AN M-CLASS FLARE WITH THE INTERFACE REGION IMAGING SPECTROGRAPH." Astrophysical Journal 833, no. 1 (December 2016). DOI:https://dx.doi.org/10.3847/1538-4357/833/1/101.en_US
dc.identifier.issn0004-637X
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/12717
dc.description.abstractDespite significant advances in instrumentation, there remain no studies that analyze observations of on-disk flare loop plasma flows covering the entire evolution from chromospheric evaporation, through plasma cooling, to draining downflows. We present results from an imaging and spectroscopic observation from the Interface Region Imaging Spectrograph (IRIS) of the SOL2015-03-12T11:50:00 M-class flare, at high spatial resolution and time cadence. Our analysis of this event reveals initial plasma evaporation at flare temperatures indicated by 100-200 km s(-1) blueshifts in the Fe XXI line. We subsequently observe plasma cooling into chromospheric lines (Si IV and O IV) with similar to 11 minute delay, followed by loop draining at similar to 40 km s(-1) as indicated by a \C\"-shaped redshift structure and significant (similar to 60 km s(-1)) non-thermal broadening. We use density-sensitive lines to calculate a plasma density for the flare loops, and estimate a theoretical cooling time approximately equal to the observed delay. Finally, we use a simple elliptical free-fall draining model to construct synthetic spectra, and perform what we believe to be the first direct comparison of such synthetic spectra to observations of draining downflows in flare loops."en_US
dc.description.sponsorshipESA; Norwegian Space Centre; Lockheed Martin (8100002702)en_US
dc.language.isoen_USen_US
dc.titleOBSERVATION AND ANALYSIS OF BALLISTIC DOWNFLOWS IN AN M-CLASS FLARE WITH THE INTERFACE REGION IMAGING SPECTROGRAPHen_US
dc.typeArticleen_US
mus.citation.issue1en_US
mus.citation.journaltitleAstrophysical Journalen_US
mus.citation.volume833en_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.identifier.doihttps://dx.doi.org/10.3847/1538-4357/833/1/101en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentPhysics.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage7en_US


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