The identification of rare earths in the silicon star HD 187473

Details The identification of rare earths in the silicon star HD 187473 The identification of rare earths in the silicon star HD 187473

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....87..369h&link_type=abstract

Astronomy and Astrophysics, vol. 87, no. 3, July 1980, p. 369-372. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

2

A Stars, Chemical Composition, Metallic Stars, Rare Earth Elements, Silicon, Stellar Spectra, Line Spectra, Stellar Spectrophotometry, Stellar Structure, Stellar Temperature, Ubv Spectra

Scientific paper

A twelve Angstron/mm blue spectrum of HD 187473, taken near phase of minimum light in uvby, has been analysed for element identifications. The silicon type classification (Bidelman, McConnell, 1973) is confirmed. The iron group spectra are weak, except for iron itself. Although blending is a serious problem, since rotational line broadening is important, some light and intermediate lanthanides have been readily identified. Strong lines of ionized europium have been found, while weaker stellar features have been attributed to La II and Pr II. Furthermore, there is statistical evidence for the presence of Ce II, Nd II, and Sm II. HD 187473 is the hottest peculiar star with a convincing evidence for ionized lanthanum.

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