Infrared Fe II lines in Eta Carinae and a possible interpretation of infrared excesses

Astronomy and Astrophysics – Astronomy

Scientific paper

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Infrared Spectra, Iron, Near Infrared Radiation, Radiative Recombination, Stellar Spectra, Variable Stars, Cosmic Dust, Emission Spectra, Energy Levels, Metal Ions, Recombination Reactions, Supernovae

Scientific paper

The identification of very strong emission lines in the near infrared spectrum of Eta Carinae with newly recognized high-level transitions of Fe II raises the possibility that the infrared excesses of hot emission-line stars may be due to dielectronic recombination of Fe II. Johansson's Fe II lines also need to be considered in the interpretation of the infrared spectra of supernovae.

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