Abundances of selected elements in five oxygen-poor stars in Omega Centauri

Daniel Zucker; George Wallerstein; Jeffery A. Brown

doi:10.1086/133812

Abundances of selected elements in five oxygen-poor stars in Omega Centauri

Daniel Zucker^*, George Wallerstein, Jeffery A. Brown

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We have derived abundances or upper limits for Fe, O, Na, Al, Sc, and Eu in five oxygen-poor red giants in Omega Centauri, a globular cluster which displays a metallicity range of some 1.5 dex. All of the stars show large Al excesses and slight Sc excesses, and all but one reveal an excess of Na. We find either solar or slightly deficient Eu abundances in these stars, in agreement with other recent results. We have also used spectral synthesis to derive ¹²C/¹³C ratios which are similar to ratios obtained for oxygen-rich stars in Omega Centauri and in other globular clusters.

Original language	English
Pages (from-to)	911-916
Number of pages	6
Journal	Publications of the Astronomical Society of the Pacific
Volume	108
Issue number	728
DOIs	https://doi.org/10.1086/133812
Publication status	Published - Oct 1996
Externally published	Yes

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title = "Abundances of selected elements in five oxygen-poor stars in Omega Centauri",

abstract = "We have derived abundances or upper limits for Fe, O, Na, Al, Sc, and Eu in five oxygen-poor red giants in Omega Centauri, a globular cluster which displays a metallicity range of some 1.5 dex. All of the stars show large Al excesses and slight Sc excesses, and all but one reveal an excess of Na. We find either solar or slightly deficient Eu abundances in these stars, in agreement with other recent results. We have also used spectral synthesis to derive 12C/13C ratios which are similar to ratios obtained for oxygen-rich stars in Omega Centauri and in other globular clusters.",

author = "Daniel Zucker and George Wallerstein and Brown, {Jeffery A.}",

year = "1996",

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T1 - Abundances of selected elements in five oxygen-poor stars in Omega Centauri

AU - Zucker, Daniel

AU - Wallerstein, George

AU - Brown, Jeffery A.

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N2 - We have derived abundances or upper limits for Fe, O, Na, Al, Sc, and Eu in five oxygen-poor red giants in Omega Centauri, a globular cluster which displays a metallicity range of some 1.5 dex. All of the stars show large Al excesses and slight Sc excesses, and all but one reveal an excess of Na. We find either solar or slightly deficient Eu abundances in these stars, in agreement with other recent results. We have also used spectral synthesis to derive 12C/13C ratios which are similar to ratios obtained for oxygen-rich stars in Omega Centauri and in other globular clusters.

AB - We have derived abundances or upper limits for Fe, O, Na, Al, Sc, and Eu in five oxygen-poor red giants in Omega Centauri, a globular cluster which displays a metallicity range of some 1.5 dex. All of the stars show large Al excesses and slight Sc excesses, and all but one reveal an excess of Na. We find either solar or slightly deficient Eu abundances in these stars, in agreement with other recent results. We have also used spectral synthesis to derive 12C/13C ratios which are similar to ratios obtained for oxygen-rich stars in Omega Centauri and in other globular clusters.

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JO - Publications of the Astronomical Society of the Pacific

JF - Publications of the Astronomical Society of the Pacific

IS - 728

ER -

Abundances of selected elements in five oxygen-poor stars in Omega Centauri

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