The spectrum of FG SGE in 1994.

Details The spectrum of FG SGE in 1994. The spectrum of FG SGE in 1994.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...297l..33k&link_type=abstract

Astronomy and Astrophysics, v.297, p.L33

Astronomy and Astrophysics

Astrophysics

15

Stars: Post-Agb, Stars: Chemically Peculiar, Stars: Individual Fg Sge

Scientific paper

We describe the high-resolution spectra of FG Sagittae obtained in 1994 during the current episode of the star's activity. The abundances of iron-peak and s-process elements have not changed compared to those of the previous decade. The presence of carbon molecular bands is confirmed and the carbon to oxygen abundance ratio is estimated to be C/O=4.5. It is the first time the spectrum of FG Sge shows P Cygni like profiles of sodium D lines. From absorption components of these lines we estimate the mass loss rate, M=3x10^-7^Msun_/yr. From fast changes of emission intensity we conclude that FG Sge ejected a shell in July, 1994. These findings support the R CrB type model of FG Sge.

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