The identification of rare earths in the silicon star HD 187473

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TypeArticle
Journal titleAstronomy and Astrophysics
ISSN0004-6361
Volume87
Issue3
Pages369372; # of pages: 4
SubjectA stars; chemical composition; metallic stars; rare earth elements; silicon; stellar spectra; line spectra; stellar spectrophotometry; stellar structure; stellar temperature; ubv spectra
AbstractA 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.
Publication date
LanguageEnglish
AffiliationNRC Herzberg Institute of Astrophysics; National Research Council Canada
Peer reviewedYes
NRC number369-372
NPARC number21275047
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Record identifiere51c3a39-3e0b-463c-8fe2-908101fe2891
Record created2015-05-06
Record modified2016-05-09
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