The pure absorption spectrum of FG Sagittae in 1980

Details The pure absorption spectrum of FG Sagittae in 1980 The pure absorption spectrum of FG Sagittae in 1980

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984sval...10...91k&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 10, Mar. 1984, p. 219-222) Soviet Astronomy Letters (ISSN 0360-0327), vol. 10, Mar.-Apr

Astronomy and Astrophysics

Astronomy

3

Absorption Spectra, Stellar Atmospheres, Stellar Spectra, Supergiant Stars, Line Spectra, Planetary Nebulae

Scientific paper

The 28-A-dispersion spectrograms of the variable supergiant FG Sge reported by Kipper (1981) are reexamined, and the 4498-4522-A and 4694-4718-A portions are compared with synthetic spectra generated using a plane-parallel LTE model atmosphere with effective temperature 4800 K and log g = 0.0. It is found that the intensity peaks suspected of being emission lines are merely gaps in a pure absorption spectrum. The only bright lines seen in FG Sge are thus the red forbidden lines of N II from the surrounding planetary nebula.

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