Identification of new fluorescence processes in the UV spectra of cool stars from new energy levels of FeII and CrII
Abstract
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.
- Publication:
-
ESA Special Publication
- Pub Date:
- June 1988
- Bibcode:
- 1988ESASP.281a.361J
- Keywords:
-
- Cool Stars;
- Fluorescence;
- Iue;
- Spaceborne Astronomy;
- Ultraviolet Astronomy;
- Ultraviolet Spectra;
- Chromium;
- Emission Spectra;
- Iron;
- Line Spectra;
- Lyman Alpha Radiation;
- Molecular Energy Levels;
- Astronomy