Fe II level population in luminous variable stars

Details Fe II level population in luminous variable stars Fe II level population in luminous variable stars

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.357v&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 357-359 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

5

Emission Spectra, Iron, Iue, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Variable Stars, Electron Recombination, Optical Emission Spectroscopy

Scientific paper

The overall FeII level population in the luminous variable stars KQ Pup and AG Car was derived using the self absorption curve method of analysis of the optical and UV Fe II emission lines. Most levels are nearly populated according a Boltzmann-type law with excitation temperatures of 6500 and 7500 K for KQ Pup and AG Car respectively. For KQ Pup there is evidence of selective excitation processes and dielectronic recombination in the level population. The importance of the study of the Fe II spectrum as diagnostics of the physical processes in astrophysical objects, from stellar chromospheres to distant galaxies, is discussed.

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