'P Cygni' profiles in P Cygni

Details 'P Cygni' profiles in P Cygni 'P Cygni' profiles in P Cygni

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...104l...7g&link_type=abstract

Astronomy and Astrophysics, vol. 104, no. 2, Dec. 1981, p. L7-L9.

Astronomy and Astrophysics

Astronomy

1

B Stars, Electron Recombination, Emission Spectra, Stellar Spectra, Line Spectra, Silicon, Ultraviolet Astronomy

Scientific paper

Attention is given to the proposal made by Underhill (1981) that two strong emission features near lambda 1306 and lambda 1309 in the spectrum of P Cygni are the result of dielectronic recombination through the autoionizing levels 3s3p3d 2F0 of Si II, giving rise to multiplet UV 13.04. It is found that the lines of this multiplet are closely blended with resonance lines of O I, Si II, and, to some extent, N I. It is shown that the observed spectrum may be accounted for by P Cygni profiles of the resonance lines and that, in the absence of corroborating qualitative calculations, the dielectronic recombination hypothesis is unjustified.

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