Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238..905c&link_type=abstract
Astrophysical Journal, Part 1, vol. 238, June 15, 1980, p. 905-908.
Astronomy and Astrophysics
Astrophysics
31
Emission Spectra, Line Spectra, Stellar Spectrophotometry, T Tauri Stars, Ultraviolet Spectra, Chromosphere, Electron Density (Concentration), Far Ultraviolet Radiation, Iue, Solar Atmosphere, Solar Corona, Spectrum Analysis, Stellar Evolution, Temperature Distribution
Scientific paper
Spectroscopic diagnostics based on UV emission line observations have been developed to study the solar chromosphere, transition region, and corona. The atmospheric properties that can be inferred from observations of total line intensities include the temperature, by identifying the ionic species present; the temperature distribution of the emission measure, from the absolute intensities; and the electron density of the source, from line intensity ratios sensitive to the electron density. In the present paper, the temperature distribution of the emission measure is estimated from observations of far UV emission line fluxes of the T Tauri stars, RW Aurigae and RU Lupi, made on the IUE. A crude estimate of the electron density of one star is obtained, using density-sensitive line ratios.
Cram Lawrence E.
Giampapa Mark S.
Imhoff Catherine L.
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