Metallicity Measurements of Pleiades Young Dwarfs
| Autor: | Hitoshi Funayama, Yoichi Itoh, Yumiko Oasa, Osamu Hashimoto, Tadashi Mukai, Eri Toyota |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
Metallicity Iron absorption Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Optical spectra law.invention Telescope Stars Space and Planetary Science law Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Pleiades Spectrograph Astrophysics::Galaxy Astrophysics |
| Zdroj: | Publications of the Astronomical Society of Japan. 61:931-939 |
| ISSN: | 2053-051X 0004-6264 |
| Popis: | We present metallicity analyses of A, F, and G stars in the Pleiades cluster. High-resolution spectroscopic observations of 25 stars were made with the HIDES spectrograph on the Okayama 1.88-m telescope and the GAOES spectrograph on the Gunma 1.5-m telescope. The resultant optical spectra had an S=N of 70–220. We measured the equivalent widths of � 60 neutral iron and � 15 single-ionized iron absorption lines to determine stellar parameters and metallicities. We derived the metallicities of 22 stars by adapting the method of equivalent-width measurements. The average metallicity was +0.03 ˙ 0.05 dex. The dispersion was comparable to the statistical uncertainties of the metallicity measurements; in addition, the metallicities of all 22 stars fell within the dispersion range, indicating their uniform metallicities. A comparison of our results with previous studies confirmed a high probability of metallicity homogeneity in Pleiades. |
| Databáze: | OpenAIRE |
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