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19 April 2024 |
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Chemical Abundances in the Carina dSph Galaxy | | Tammy A. Smecker-Hane
; Georgi I. Mandushev
; James E. Hesser
; Peter B. Stetson
; G. S. Da Costa
; Despina Hatzidimitriou
; | | Date: |
12 Oct 1999 | | Subject: | astro-ph | | Affiliation: | Univ. of California, Irvine), James E. Hesser, Peter B. Stetson (Nat. Res. Council of Canada, Herzberg Inst. of Astrophys., Dominion Astrophys. Obs.), G. S. Da Costa (Australia National Univ.) and Despina Hatzidimitriou (Univ. of Crete | | Abstract: | We report on the chemical abundances of stars in the Carina dwarf spheroidal galaxy (dSph) derived from low-resolution spectra. We have determined values of [Fe/H] for 52 stars from the reduced equivalent width of the Ca II infrared triplet lines. The Carina dSph has a mean metallicity of [Fe/H] = -1.99 +/- 0.08 and an intrinsic metallicity dispersion 0.25 dex (1 sigma). By directly determining the chemical abundances of Carina stars through spectroscopy, we can overcome the age-metallicity degeneracy inherent in color-magnitude diagrams (CMDs) and determine its star-formation history with unprecedented accuracy. | | Source: | arXiv, astro-ph/9910212 | | Services: | Forum | Review | PDF | Favorites | |
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