Metal-rich end of galactic chemical evolution: Oxygen abundances from [O I] 6300, O I 7771-5 and near-UV OH

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Ecuvillon, A (Author) Other; Israelian, G (Author) Other; N.C. Santos (Author) Other; Shchukina, NG (Author) Other; Mayor, M (Author) Other; Rebolo, R (Author) Other

Journal

Title: Proceedings of the International Astronomical Union

Vol. 1

Pages: 253-254

ISSN: 1743-9213

Publisher: Cambridge University Press

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-007-PZ7

DOI: 10.1017/s1743921305005697

Abstract (EN): We present a detailed and uniform study of oxygen abundances in a large set of 155 metal-rich dwarfs. EW measurements were carried out for the [O I] 6300 Å line and the O I triplet, while spectral synthesis was performed for several OH lines. NLTE corrections were calculated and applied to the LTE abundance results derived from the triplet. Abundances from [O I], the O I triplet and near-UV OH were obtained in 103, 87 and 77 dwarfs, respectively. A good agreement between [O/H] ratios from forbidden and OH lines is found, while the NLTE triplet shows a systematically lower abundance. Nevertheless, the consistency with other indicators improves if we consider LTE triplet results. In any case, discrepancies between OH, [O I] and the O I triplet hardly exceed 0.2 dex. All three indicators show that, on average, [O/Fe] decreases with [Fe/H] in the metallicity range -0.8 < [Fe/H] < 0.5. © 2005 International Astronomical Union.

Language: English

Type (Professor's evaluation): Scientific