Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.361j&link_type=abstract
In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 361-363 (SEE N89-10682 01-89)
Astronomy and Astrophysics
Astronomy
6
Cool Stars, Fluorescence, Iue, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Chromium, Emission Spectra, Iron, Line Spectra, Lyman Alpha Radiation, Molecular Energy Levels
Scientific paper
Two fluorescence processes operating in atmospheres of cool stars, symbiotic stars, and the Sun are presented. Two emission lines, at 1347.03 and 1360.17 A, are identified as fluorescence lines of Cr II and Fe II. The lines are due to transitions from highly excited levels, which are populated radiatively by the hydrogen Lyman alpha line due to accidental wavelength coincidences. Three energy levels, one in Cr II and two in Fe II, are reported.
Carpenter Kenneth G.
Johansson Sveneric
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