Elemental abundances of three red giants in Terzan 7, a globular cluster associated with the Sagittarius galaxy

Tautvaisiene, G.; Wallerstein, G; Geisler, D; Gonzales, G; Charbonnel C.

Abstract

Chemical abundances in three giants in Terzan 7, a globular cluster associated with the Sagittarius dwarf galaxy, have been determined using high-resolution spectra obtained with the UVES spectrograph on the ESO 8.2 m Kueyen telescope. We find the overall metallicity of the stars to be [Fe/H]= -0.61±0.07, which is slightly higher than that previously evaluated from photometry and used for the age determination of this cluster. This metallicity yields an age of about 6 Gyr, which is slightly lower than derived from previous estimates. The relative abundance ratios of various chemical elements to iron lie between those of its host galaxy's metal-poor and metal-rich stars and reveal an intriguing similarity to the pattern seen in the Large Magellanic Cloud.

Más información

Título según WOS: Elemental abundances of three red giants in Terzan 7, a globular cluster associated with the Sagittarius galaxy
Título según SCOPUS: Elemental abundances of three red giants in terzan 7, a globular cluster associated with the sagittarius galaxy
Título de la Revista: ASTRONOMICAL JOURNAL
Volumen: 127
Número: 1
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2004
Página de inicio: 373
Página final: 379
Idioma: English
URL: http://stacks.iop.org/1538-3881/127/i=1/a=373
DOI:

10.1086/379561

Notas: ISI, SCOPUS