Matches in SemOpenAlex for { <https://semopenalex.org/work/W2034457553> ?p ?o ?g. }
- W2034457553 endingPage "706" @default.
- W2034457553 startingPage "684" @default.
- W2034457553 abstract "We have used UVES on VLT-UT2 to take spectra of 15 red giants in the Sculptor, Fornax, Carina and Leo I dwarf spheroidal galaxies. We measure the abundances of alpha, iron peak, s and r-process elements. No dSph giants in our sample show the deep mixing abundance pattern seen in nearly all globular clusters. At a given metallicity, the dSph giants exhibit lower [el/Fe] abundance ratios for the alpha elements than stars in the Galactic halo. This can be caused by a slow star formation rate and contribution from Type Ia SN, and/or a small star formation event (low total mass) and mass dependent Type II SN yields. Differences in the even-Z [el/Fe] ratios between these galaxies, as well as differences in the evolution of the s&r-process elements are interpreted in terms of their star formation histories. Comparison of the dSph abundances with those of the Galactic halo reveals some consistencies. In particular, we find stars that mimic the abundance pattern found by Nissen & Shuster (1997) for metal-rich, high R_max, high z_max halo stars, supporting their suggestion that disrupted dSph's may explain up to 50% of the metal-rich halo. A comparison with the metal-poor Galactic halo reveal no consistencies suggesting that the majority of the metal-poor Galactic halo could not have been formed from objects similar to these dSph. Finally, we use the dSph abundances to place new constraints on the nucleosynthetic origins, including Cu and Mn which are more consistent with metallicity dependent SN yields than the more commonly assumed SN Ia production." @default.
- W2034457553 created "2016-06-24" @default.
- W2034457553 creator A5011033572 @default.
- W2034457553 creator A5019716342 @default.
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- W2034457553 creator A5028676154 @default.
- W2034457553 creator A5065682440 @default.
- W2034457553 creator A5088467344 @default.
- W2034457553 date "2003-02-01" @default.
- W2034457553 modified "2023-10-16" @default.
- W2034457553 title "VLT/UVES Abundances in Four Nearby Dwarf Spheroidal Galaxies. I. Nucleosynthesis and Abundance Ratios" @default.
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