Diagnostic application of highly ionized iron lines in the XUV spectrum of a solar flare
Identifieur interne : 005021 ( Main/Exploration ); précédent : 005020; suivant : 005022Diagnostic application of highly ionized iron lines in the XUV spectrum of a solar flare
Auteurs : H. E. Mason [Royaume-Uni] ; A. K. Bhatia [États-Unis] ; S. O. Kastner [Canada] ; W. M. Neupert [États-Unis] ; M. Swartz [États-Unis]Source :
- Solar Physics [ 0038-0938 ] ; 1984-05-01.
Abstract
Abstract: Recent atomic data have been used to analyze a solar flare spectrum obtained with the Goddard Space Flight Center's grating spectrometer on the OSO-5 satellite. There exist in the wavelength region 90–200 Å strong lines from each of the ions Fe xviii-Fe xxiv. The Fe xxi lines can be used as an electron density diagnostic for the 107 K plasma. From our analysis of a particular flare, we find a steep positive slope in the emission measure between 106.5 and 107.2 K and an electron density of ∼4 × 1011 cm−3 at 107 K. We emphasise the need for high spectral and spatial resolution observations of solar flares in this wavelength region, which has to date been largely neglected.
Url:
DOI: 10.1007/BF00157246
Affiliations:
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E." last="Mason">H. E. Mason</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Department of Applied Mathematics and Theoretical Physics, Silver Street, CB3 9EW, Cambridge</wicri:regionArea><wicri:noRegion>Cambridge</wicri:noRegion></affiliation></author><author><name sortKey="Bhatia, A K" sort="Bhatia, A K" uniqKey="Bhatia A" first="A. K." last="Bhatia">A. K. Bhatia</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>NASA/Goddard Space Flight Center, 20771, Greenbelt, MD</wicri:regionArea><placeName><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Kastner, S O" sort="Kastner, S O" uniqKey="Kastner S" first="S. O." last="Kastner">S. O. 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There exist in the wavelength region 90–200 Å strong lines from each of the ions Fe xviii-Fe xxiv. The Fe xxi lines can be used as an electron density diagnostic for the 107 K plasma. From our analysis of a particular flare, we find a steep positive slope in the emission measure between 106.5 and 107.2 K and an electron density of ∼4 × 1011 cm−3 at 107 K. We emphasise the need for high spectral and spatial resolution observations of solar flares in this wavelength region, which has to date been largely neglected.</div></front></TEI><affiliations><list><country><li>Canada</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Maryland</li></region></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Mason, H E" sort="Mason, H E" uniqKey="Mason H" first="H. E." last="Mason">H. E. Mason</name></noRegion></country><country name="États-Unis"><region name="Maryland"><name sortKey="Bhatia, A K" sort="Bhatia, A K" uniqKey="Bhatia A" first="A. K." last="Bhatia">A. K. 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