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The Fe II excitation mechanism in KQ Puppis
Received 23 June 2000 / Accepted 22 September 2000
We discuss different excitation processes behind the Fe II emission lines in the IUE spectrum of KQ Puppis (Boss 1985), a VV Cephei type of spectroscopic binary. Several papers have been published on the subject suggesting a number of processes behind the strong Fe II emission lines. We propose that there are two processes operating: selective photoexcitation by continuum radiation (PCR) from the B-star companion, and photoexcitation by accidental resonance (PAR) by the H Ly radiation field. We suggest excitation channels for each of the Fe II emission lines identified in the spectrum.
Key words: atomic data atomic processes stars: binaries: spectroscopic stars: individual: KQ Puppis
Send offprint requests to: A. Redfors
Online publication: January 29, 2001