VLT-UVES abundance analysis of four giants in NGC 6553

A. Alves-Brito; B. Barbuy; M. Zoccali; D. Minniti; S. Ortolani; V. Hill; A. Renzini; L. Pasquini; E. Bica; R. M. Rich; J. Meléndez; Y. Momany

doi:10.1051/0004-6361:20065488

VLT-UVES abundance analysis of four giants in NGC 6553

A. Alves-Brito^*, B. Barbuy, M. Zoccali, D. Minniti, S. Ortolani, V. Hill, A. Renzini, L. Pasquini, E. Bica, R. M. Rich, J. Meléndez, Y. Momany

^*Corresponding author for this work

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

39 Citations (Scopus)

Abstract

Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of this study is to determine the metallicity and elemental ratios in individual stars of the metal-rich bulge globular cluster NGC 6553. Methods. A detailed abundance analysis of four giants in NGC 6553 is carried out, based on optical high-resolution échelle spectra obtained with UVES at the ESO VLT-UT2 Kueyen telescope. Results. A metallicity [Fe/H] = -0.20 dex is derived, together with α-element enhancement of Mg and Si ([Mg/Fe] = +0.28, [Si/Fe] = +0.21), solar Ca and Ti ([Ca/Fe] = +0.05, [Ti/Fe] = -0.01), and a mild enhancement of the r-process element Eu with [Eu/Fe] = +0.10. A mean heliocentric radial velocity of -1.86 km s^-1 is measured. We compare our results with previous investigations of the cluster.

Original language	English
Pages (from-to)	269-276
Number of pages	8
Journal	Astronomy and Astrophysics
Volume	460
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361:20065488
Publication status	Published - 2006

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@article{96992fe970e147458015080297581963,

title = "VLT-UVES abundance analysis of four giants in NGC 6553",

abstract = "Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of this study is to determine the metallicity and elemental ratios in individual stars of the metal-rich bulge globular cluster NGC 6553. Methods. A detailed abundance analysis of four giants in NGC 6553 is carried out, based on optical high-resolution {\'e}chelle spectra obtained with UVES at the ESO VLT-UT2 Kueyen telescope. Results. A metallicity [Fe/H] = -0.20 dex is derived, together with α-element enhancement of Mg and Si ([Mg/Fe] = +0.28, [Si/Fe] = +0.21), solar Ca and Ti ([Ca/Fe] = +0.05, [Ti/Fe] = -0.01), and a mild enhancement of the r-process element Eu with [Eu/Fe] = +0.10. A mean heliocentric radial velocity of -1.86 km s-1 is measured. We compare our results with previous investigations of the cluster.",

keywords = "Galaxy: bulge, Globular clusters: individual: NGC 6553, Hertzsprung-Russell (HR) and C-M diagrams, Stars: abundances",

author = "A. Alves-Brito and B. Barbuy and M. Zoccali and D. Minniti and S. Ortolani and V. Hill and A. Renzini and L. Pasquini and E. Bica and Rich, {R. M.} and J. Mel{\'e}ndez and Y. Momany",

year = "2006",

doi = "10.1051/0004-6361:20065488",

language = "English",

volume = "460",

pages = "269--276",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "1",

}

TY - JOUR

T1 - VLT-UVES abundance analysis of four giants in NGC 6553

AU - Alves-Brito, A.

AU - Barbuy, B.

AU - Zoccali, M.

AU - Minniti, D.

AU - Ortolani, S.

AU - Hill, V.

AU - Renzini, A.

AU - Pasquini, L.

AU - Bica, E.

AU - Rich, R. M.

AU - Meléndez, J.

AU - Momany, Y.

PY - 2006

Y1 - 2006

N2 - Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of this study is to determine the metallicity and elemental ratios in individual stars of the metal-rich bulge globular cluster NGC 6553. Methods. A detailed abundance analysis of four giants in NGC 6553 is carried out, based on optical high-resolution échelle spectra obtained with UVES at the ESO VLT-UT2 Kueyen telescope. Results. A metallicity [Fe/H] = -0.20 dex is derived, together with α-element enhancement of Mg and Si ([Mg/Fe] = +0.28, [Si/Fe] = +0.21), solar Ca and Ti ([Ca/Fe] = +0.05, [Ti/Fe] = -0.01), and a mild enhancement of the r-process element Eu with [Eu/Fe] = +0.10. A mean heliocentric radial velocity of -1.86 km s-1 is measured. We compare our results with previous investigations of the cluster.

AB - Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of this study is to determine the metallicity and elemental ratios in individual stars of the metal-rich bulge globular cluster NGC 6553. Methods. A detailed abundance analysis of four giants in NGC 6553 is carried out, based on optical high-resolution échelle spectra obtained with UVES at the ESO VLT-UT2 Kueyen telescope. Results. A metallicity [Fe/H] = -0.20 dex is derived, together with α-element enhancement of Mg and Si ([Mg/Fe] = +0.28, [Si/Fe] = +0.21), solar Ca and Ti ([Ca/Fe] = +0.05, [Ti/Fe] = -0.01), and a mild enhancement of the r-process element Eu with [Eu/Fe] = +0.10. A mean heliocentric radial velocity of -1.86 km s-1 is measured. We compare our results with previous investigations of the cluster.

KW - Galaxy: bulge

KW - Globular clusters: individual: NGC 6553

KW - Hertzsprung-Russell (HR) and C-M diagrams

KW - Stars: abundances

UR - http://www.scopus.com/inward/record.url?scp=33845288382&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20065488

DO - 10.1051/0004-6361:20065488

M3 - Article

SN - 0004-6361

VL - 460

SP - 269

EP - 276

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

VLT-UVES abundance analysis of four giants in NGC 6553

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