Family ties: Abundances in Terzan 7, a Sgr dSph globular cluster
نویسندگان
چکیده
منابع مشابه
Family ties : abundances in Terzan 7 , a Sgr dSph globular cluster ⋆
We study the chemical composition of 5 giant stars in the globular cluster Terzan 7 associated with the Sagittarius dwarf spheroidal galaxy (Sgr dSph), based on high resolution UVES-VLT spectra. We confirm the metallicity found by previous high resolution investigations: [Fe/H]∼ −0.6. We also show that this cluster displays the same low α−element to iron ratio found in Sgr dSph field stars of s...
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Context. Recently, Carraro (2005) drew attention to the remarkable star cluster Whiting 1 by showing that it lies about 40 kpc from the Sun and is therefore unquestionably a member of the Galactic halo (b=-60.6 deg.). Its Color Magnitude Diagram (CMD) indicated that Whiting 1 is very young (∼5 Gyrs) for a globular cluster. It is very likely that Whiting 1 originated in a dwarf galaxy that has s...
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متن کاملUVES detailed chemical abundances in the Sgr dSph and the CMa overdensity
In this contribution, we present detailed chemical abundances on two stellar systems presently believed to be undergoing tidal merging with the Milky Way (MW). The first one is the Sagittarius Dwarf Spheroidal (Sgr dSph, [5]), a massive (10 M⊙) dSph orbiting along a very short period (< 1GY r) almost polar orbit inside the Halo, along which is slowly dissolving in a huge stellar stream [6]. The...
متن کاملFirst results of UVES at VLT: abundances in the Sgr dSph
Two giants of the Sagittarius dwarf spheroidal have been observed with the UVES spectrograph on the ESO 8.2m Kueyen telescope, during the commissioning of the instrument. Sgr 139 has [Fe/H]= −0.28 and Sgr 143 [Fe/H]= −0.21, these values are considerably higher than photometric estimates of the metallicity of the main population of Sgr. We derived abundances for O, Na, Mg, Al, Si, Ca, Sc, Ti, V,...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2005
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20042315