| Issue |
A&A
Volume 490, Number 1, October IV 2008
|
|
|---|---|---|
| Page(s) | 297 - 305 | |
| Section | Stellar atmospheres | |
| DOI | https://doi.org/10.1051/0004-6361:200810260 | |
| Published online | 11 September 2008 | |
Spectroscopic metallicities of Vega-like stars*
1
Complejo Astronómico El Leoncito, CC 467, 5400 San Juan, Argentina e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
2
Observatorio Astronómico de Córdoba, Laprida 854, 5000 Córdoba, Argentina e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
3
Instituto Superior de Correlación Geológica (INSUGEO), 4000 Tucumán, Argentina e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
4
Facultad de Ciencias Exactas, Físicas y Naturales (UNSJ), 5400 San Juan, Argentina e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
26
May
2008
Accepted:
1
August
2008
Abstract
Aims. We aim to determine the metallicities of 113 Southern Hemisphere Vega-like candidate stars in relation to the giant exoplanet host group and field stars.
Methods. We applied two spectroscopic methods of abundance determinations: equivalent width measurements together with the ATLAS9 model atmospheres and the WIDTH9 program, and a comparison of observed spectra with a grid of synthetic spectra.
Results. For the Vega-like group, the metallicities are indistinguishable from those of field stars not known to be associated with planets or disks. This result is quite different from the metallicities of giant exoplanet host stars, which are metal-rich in comparison to field stars.
Key words: techniques: spectroscopic / stars: abundances / stars: late-type
Tables 1–4 are only available in electronic form at http://www.aanda.org
© ESO, 2008
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