Fluorescence processes and line identifications in the UV spectra of cool stars

Details Fluorescence processes and line identifications in the UV spectra of cool stars Fluorescence processes and line identifications in the UV spectra of cool stars

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.349c&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 349-356 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

1

Chromosphere, Cool Stars, Fluorescence, Iue, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Emission Spectra, Iron, Stellar Atmospheres

Scientific paper

Fluorescence processes active in the outer atmospheres of noncoronal cool stars and the UV lines they produce are summarized. Eight pumping processes and 21 fluorescent line products are discussed. The processes, which produce 12 lines, involves energy levels not previously known to be radiatively populated. Four of these are examples of self-fluorescence, whereby one or more lines of Fe II photo-excite through coincident lines the upper levels of other Fe II lines lines seen in emission, while two others explain the selective excitation of solitary Ni II and Si I lines. Nine of the line products are decays from levels in Fe I and Fe II already known to be radiatively populated.

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