2008A&A...485..257F -
Astronomy and Astrophysics, volume 485, 257-265 (2008/7-1)
Abundance analysis of seven δ Scuti stars.
FOSSATI L., KOLENBERG K., REEGEN P. and WEISS W.
Abstract (from CDS):
The current knowledge of the abundance pattern in δ Scuti stars is based on analysis of just a few field stars. We aim to determine the general chemical properties of the atmospheres of δ 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. We analysed high-resolution, high signal-to-noise ratio spectra of seven field δ Scuti stars. We derived the fundamental parameters and the photospheric abundances and than compared them to a similar sample of cluster δ Scuti stars. 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 δ Scuti stars. We do not find any substantial difference between the abundance pattern of our sample of δ 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.
Abstract Copyright:
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Journal keyword(s):
stars: abundances - stars: atmospheres - delta Sct
Simbad objects:
19
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