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Author Doschek, G. A. ♦ Cowan, R. D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ SUN ♦ X-RAY SPECTRA ♦ ACCURACY ♦ AMPLITUDES ♦ BINARY STARS ♦ CATALOGS ♦ DATA COMPILATION ♦ ELEMENTS ♦ EMISSION SPECTRA ♦ ENERGY SPECTRA ♦ ENERGY-LEVEL TRANSITIONS ♦ PLASMA ♦ SOLAR FLARES ♦ TABLES ♦ WAVELENGTHS ♦ X RADIATION ♦ DATA ♦ DOCUMENT TYPES ♦ ELECTROMAGNETIC RADIATION ♦ INFORMATION ♦ IONIZING RADIATIONS ♦ MAIN SEQUENCE STARS ♦ NUMERICAL DATA ♦ RADIATIONS ♦ SOLAR ACTIVITY ♦ SPECTRA ♦ STARS ♦ Astrophysics & Cosmology- Solar Phenomena
Abstract A spectral line list for the 10--200 A range is developed from existing solar spectra for application to high spectral resolution measurements of astrophysical plasmas. The solar spectral line lists are merged into a single comprehensive list. the effect of the solar emission measure distribution is removed from the line intensities, which results in a set of emission rates for the lines that can be applied to many optically thin, low density high temperature plasmas in ionization equilibrium. In addition to the measured solar lines, approx.250 theoretical lines are added to this list. These lines fall in wavelength regions where the existing solar lists have few lines because of limitations in instrumental sensitivity. Also, some lines have been added because the Sun has very little plasma at temperatures of approx.10/sup 5/ K, and consequently these lines are weak or absent in solar spectra. The entire list contains approx.600 lines. Finally, predicted spectra of the two RS CVn stars, ..cap alpha.. Aur (Capella) and UX Ari, are presented at 1 and 0.25 A spectral resolution. Also, the solar spectrum is shown at 1 A resolution, and the emission rate spectrum (spectrum not modified by an emission measure distribution) is shown at very high spectral resolution.
Educational Use Research
Learning Resource Type Article
Publisher Date 1984-09-01
Publisher Place United States
Journal Astrophys. J.
Volume Number 56
Issue Number 1
Organization E. O. Hulburt Center for Space Research, Naval Research Laboratory


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