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dc.contributor.authorFox, J. Lewis
dc.contributor.authorKankelborg, Charles
dc.contributor.authorThomas, Roger J.
dc.date.accessioned2016-03-30T23:52:11Z
dc.date.available2016-03-30T23:52:11Z
dc.date.issued2010-07-27
dc.identifier.citationFox, J. Lewis, Charles C. Kankelborg, and Roger J. Thomas. “ A TRANSITION REGION EXPLOSIVE EVENT OBSERVED IN He II WITH THE MOSES SOUNDING ROCKET .” The Astrophysical Journal 719, no. 2 (July 27, 2010): 1132–1143. doi:10.1088/0004-637x/719/2/1132.en_US
dc.identifier.issn0004-637X
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/9656
dc.description.abstractTransition region explosive events (EEs) have been observed with slit spectrographs since at least 1975, most commonly in lines of C IV (1548 Å, 1550 Å) and Si IV (1393 Å, 1402 Å). We report what we believe to be the first observation of a transition region EE in He II 304 Å. With the Multi­Order Solar EUV Spectrograph (MOSES) sounding rocket, a novel slitless imaging spectrograph, we are able to see the spatial structure of the event. We observe a bright core expelling two jets that are distinctly non­collinear, in directions that are not anti­parallel. The jets have sky­plane velocities of order 75 km s­1 and line­of­sight velocities of +75 km s­1 (blue) and ­30 km s­1 (red). The core is a region of high non­thermal Doppler broadening, characteristic of EEs, with maximal broadening 380 km s­1 FWHM. It is possible to resolve the core broadening into red and blue line­of­sight components of maximum Doppler velocities +160 km s1 and ­220 km s­1. The event lasts more than 150 s. Its properties correspond to the larger, long­lived, and more energetic EEs observed in other wavelengths.en_US
dc.description.sponsorshipThis work was supported by NASA LCAS grants NAG5-10997 and NNX-07AG6G. J.L.F. was supported in part by NASA GSRP grant NGT5-50471, and by the Montana Space Grant Consortium fellowship program.en_US
dc.titleA Transition Region Explosive Event Observed in He II with the MOSES Sounding Rocket Authorsen_US
dc.typeArticleen_US
mus.citation.extentfirstpage1132en_US
mus.citation.extentlastpage1143en_US
mus.citation.issue2en_US
mus.citation.journaltitleAstrophysical Journalen_US
mus.citation.volume719en_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.identifier.doi10.1088/0004-637x/719/2/1132en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentPhysics.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage9en_US


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