Abundance analysis of seven delta Scuti Stars
arXiv:0804.2402 · doi:10.1051/0004-6361:200809541
Abstract
The current knowledge of the abundance pattern in delta Scuti stars is based on the analysis of just a few field stars. We aim to determine the general chemical properties of the atmospheres of delta Scuti stars based on a statistically relevant sample of stars and will investigate whether the abundance pattern is close to solar, an assumption generally made for pulsation models. We have analysed high-resolution, high signal-to-noise ratio spectra of seven field delta Scuti stars. We derived the fundamental parameters and the photospheric abundances and compared them to a similar sample of cluster delta Scuti stars. With the use of a t-test we demonstrated 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 did 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.
arXiv commentaccepted by Astronomy & Astrophysics
References in corpus (12)
- Searching for links between magnetic fields and stellar evolution. II. The evolution of magnetic fields as revealed by observations of Ap stars in open clusters and associations
- Searching for links between magnetic fields and stellar evolution. I. A survey of magnetic fields in open cluster A- and B-type stars with FORS1
- Searching for links between magnetic fields and stellar evolution III. Measurement of magnetic fields in open cluster Ap stars with ESPaDOnS
- Automated spectroscopic abundances of A and F-type stars using echelle spectrographs II. Abundances of 140 A-F stars from ELODIE and CORALIE
- The effect of rotation on the abundances of the chemical elements of the A-type stars in the Praesepe cluster
- A spectroscopic study of southern (candidate) gamma Doradus stars. II. Detailed abundance analysis and fundamental parameters
- Late stages of the evolution of A-type stars on the main sequence: comparison between observed chemical abundances and diffusion models for 8 Am stars of the Praesepe cluster
- A search for substellar members in the Praesepe and sigma Orionis clusters
- The Nainital-Cape Survey-III : A Search for Pulsational Variability in Chemically Peculiar Stars
- Scandium: A key element for understanding Am stars
- Pulsation of the Lambda Bootis star HD 210111
- A spectroscopic search for non-radial pulsations in the delta Scuti star gamma Bootis
Cited by in corpus (8)
- Two New Long-Period Giant Planets from the McDonald Observatory Planet Search and Two Stars with Long-Period Radial Velocity Signals Related to Stellar Activity Cycles
- Pulsational amplitude growth of the star KIC 3429637 (HD 178875) in the context of Am and rho Puppis stars
- Metallic-Line Stars Identified from Low Resolution Spectra of LAMOST DR5
- Absolute dimensions of detached eclipsing binaries. III. The metallic-lined system YZ Cassiopeiae
- Metal-Rich RRc stars in the Carnegie RR Lyrae Survey
- Looking for a connection between the Am phenomenon and hybrid delta Sct - gamma Dor pulsation: a determination of the fundamental parameters and abundances of HD 114839 and BD +18 4914
- Multisite photometry of the pulsating Herbig Ae star V346 Ori
- High-resolution spectroscopy and abundance analysis of Delta Scuti stars near the Gamma Doradus instability strip