Line identifications in the evolving star FG Sagittae

Details Line identifications in the evolving star FG Sagittae Line identifications in the evolving star FG Sagittae

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...74..755w&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 74, Nov. 1990, p. 755-767.

Astronomy and Astrophysics

Astrophysics

17

Line Spectra, Rare Earth Elements, Sagittarius Constellation, Stellar Spectra, Variable Stars, Peculiar Stars, Planetary Nebulae, Stellar Evolution, Stellar Models

Scientific paper

Wavelength measurements and line identifications from 7 A/mm Palomar spectra between 5328 and 6714 A are presented. The spectrum is dominated by lines of the singly ionized rare earths from La II through Gd II. The presence and strength of Sm, Eu, and Gd is surprising if the abundance anomalies are due to the s-process as in barium stars. This may represent the products of an unusually vigorous shell flash, an evolution toward an SC star like UY Cen, or else even evolution toward a star like HD 101065 whose surface composition is not understood.

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