Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..450c&link_type=abstract
In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 450-453 (SEE N85-20961 1
Astronomy and Astrophysics
Astronomy
1
Chromosphere, Emission Spectra, Line Spectra, Stars, Stellar Winds, Ultraviolet Spectra, Electron Density (Concentration), Iue, Ultraviolet Astronomy
Scientific paper
The identity and characteristics of the chromospheric emission features in the 2200 to 300 A region of high resolution spectra of the stars gamma Cru and alpha Ori are summarized. The velocities, fluxes, and asymmetries of a set of Fe II lines which share common upper or lower energy levels are discussed and the information gained from flux measurements of the C II (UV 0.01) lines is presented. The Fe II lines in the alpha Ori spectra indicate the general shape of the velocity versus radius relation in its wind. The C II (UV 0.01) data are combined with measures of the C II (UV 1) flux to estimate the electron density and temperature in the wind and the geometric extent of the C II emitting region in both stars.
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