Other
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.230..671a&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 230, Feb. 15, 1988, p. 671-694.
Other
62
Abundance, Astronomical Spectroscopy, Main Sequence Stars, Spectrograms, Stellar Composition, Fine Structure, Interstellar Chemistry, Lanthanum, Line Spectra, Metallicity, Signal To Noise Ratios
Scientific paper
Summary. Elemental abundance analyses were performed for three superficially normal main-sequence stars θ Leonis (A2V), τ Herculus (B5IV) and ο Pegasi (A1IV). These studies used coadded spectrograms produced from at least 12 2.4 Å IIaO Dominion Astrophysical Observatory spectrograms and show a greater degree of internal consistency and smaller microturbulent velocities than previous studies of these stars which used lower signal-to-noise data. Many lines not previously seen were identified including some of new atomic species whose analysis provide a more complete picture of the elemental abundances. The identification and analysis of La ii lines (and possibly those of several other lanthanides) in ο Peg link this star more closely with the classical metallic-lined (Am) stars, although there are considerable differences in abundances. Some of θ Leo's elemental abundances, particularly those of vanadium, strontium, and zirconium, are significantly different from solar in confirmation of previous analyses. τ Her's elemental abundances are typically a factor of 2 less than solar. The random errors in the derived abundances are probably less than a factor of 2.
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