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Title
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Abundance analysis of seven δ Scuti stars
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Author
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Abstract
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| Context. The current knowledge of the abundance pattern in delta Scuti stars is based on analysis of just a few field stars. Aims. We aim to determine the general chemical properties of the atmospheres of delta Scuti stars based on a statistically relevant sample of stars and investigate whether the abundance pattern is close to solar, an assumption generally made for pulsation models. Methods. We analysed high-resolution, high signal-to-noise ratio spectra of seven field d Scuti stars. We derived the fundamental parameters and the photospheric abundances and than compared them to a similar sample of cluster delta Scuti stars. Results. With the use of a t-test we demonstrate that there is no difference between the two samples, which allows us to merge them, resulting in a sample of fifteen delta Scuti stars. We do not find any substantial difference between the abundance pattern of our sample of delta Scuti stars and a sample of normal early A- and late F-type stars. One field star in our sample, HD 124953, is most likely a pulsating Am star. |
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Language
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English
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Source (journal)
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Astronomy and astrophysics. - Berlin, 1969, currens
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Publication
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Berlin
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Springer
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2008
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ISSN
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0004-6361
[print]
1432-0746
[online]
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DOI
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10.1051/0004-6361:200809541
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Volume/pages
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485
:1
(2008)
, p. 257-265
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ISI
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000256690600026
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Full text (Publisher's DOI)
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Full text (open access)
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