The extended star formation history ofωCentauri
نویسندگان
چکیده
منابع مشابه
The extended star formation history of ω Centauri ⋆
For the first time, the abundances of a large sample of subgiant and turn-off region stars in ω Centauri have been measured, the data base being medium resolution spectroscopy from FORS2 at the VLT. Absolute iron abundances were derived for ∼400 member stars from newly defined line indices with an accuracy of ±0.15 dex. The abundances range between −2.2 <[Fe/H]< −0.7 dex, resembling the large m...
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The star formation history in IZw18 has been inferred from HST/WFPC2 archival data. This is done by comparing the derived V, B–V and V, V–I color-magnitude diagrams and luminosity functions with synthetic ones, based on various sets of stellar evolutionary tracks. At a distance of 10 Mpc, the stars resolved in the field of IZw18 allow for a lookback time up to 1 Gyr. We find that the main body ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2004
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20040188