Elemental abundance analyses with DAO spectrograms. XXXVI. The hot metallic line stars theta Leonis and omicron Pegasi

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DOIResolve DOI: http://doi.org/10.1086/679636
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TypeArticle
Journal titlePublications of the Astronomical Society of the Pacific
ISSN0004-6280
Volume127
Issue947
Pages5866; # of pages: 9
AbstractThis series contains high-quality LTE elemental abundance analyses of sharp-lined and moderately rotating normal and peculiar Main Sequence Band B, A, and F stars. Their compositions were determined for comparison with analyses of somewhat similar stars and with theoretical predictions. Here we provide new and improved elemental abundances analyses for the well-studied hot metallic line stars θ Leonis and o Pegasi to better understand their relationship with other A stars. The analyses, which employ Kurucz’s ATLAS9 model atmospheres and WIDTH9 codes and high signal-to-noise ratio (S/N) spectrograms obtained with Reticon and CCD detectors, are consistent with our previous analyses based upon coadded photographic plates. The spectral synthesis program STELLAR is used with the fluxes, the Hγ profiles, and the spectra to provide better estimates of the effective temperature, surface gravity, and metallicity. The agreement of the results for two species of the same element are usually improved. The errors have been slightly reduced compared to those of their previous analyses using DAO spectrograms. Abundances of additional elements have been determined. The very high S/N (≥500) spectra of o Peg (used previously for the stellar atlas of Gulliver et al.) were critical to finding the weakest lines and to defining the profiles of all lines. High-quality spectrograms of additional regions especially those longward of Hβ can be used to obtain some missing elemental abundances in both stars.
Publication date
PublisherThe Astronomical Society of the Pacific
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21275820
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Record identifier4d06e777-8849-4ba8-92fe-927fda3c5a75
Record created2015-07-14
Record modified2016-05-09
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