Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aj....127..373t&link_type=abstract
The Astronomical Journal, Volume 127, Issue 1, pp. 373-379.
Astronomy and Astrophysics
Astronomy
28
Galaxies: Individual: Name: Sagittarius Dwarf Spheroidal -Galaxy: Globular Clusters: Individual: Name: Terzan 7, Stars: Abundances, Stars: Late-Type
Scientific paper
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.
Charbonnel Corinne
Geisler Doug
Gonzalez Guillermo
Tautvaisiene Gražina
Wallerstein George
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