The Fe II emission in the UV spectrum of CH CYG

Details The Fe II emission in the UV spectrum of CH CYG The Fe II emission in the UV spectrum of CH CYG

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...71..153m&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 71, no. 1, Oct. 1987, p. 153-162.

Astronomy and Astrophysics

Astrophysics

1

Emission Spectra, Iron, Spectral Line Width, Stellar Spectrophotometry, Symbiotic Stars, Ultraviolet Spectra, Fluorescence, Lyman Alpha Radiation, Optical Thickness, Tables (Data)

Scientific paper

Fe II emission lines are present in all UV spectra of CH Cyg, with a great increase in number and intensity since 1985. The authors give a list of emission intensities and equivalent widths for the prominent Fe II lines. Optical depth effects are clearly evident from a comparison of the relative emission intensities within couples of multiplets which share the same upper term. The anomalously high intensity of some emissions seems to be due to a selective fluorescence mechanism originating from Ly α.

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