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The chemical evolution of subpopulations in the Carina dwarf spheroidal

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The chemical evolution of subpopulations in the Carina dwarf spheroidal. / Koch, Andreas; Wilkinson, M.; Grebel, E. K. et al.
In: Proceedings of the International Astronomical Union, Vol. 1, No. C198, 2005, p. 134-138.

Research output: Contribution to Journal/Magazine › Journal article

Harvard

Koch, A, Wilkinson, M, Grebel, EK, Harbeck, D, Kleyna, J, Wyse, RFG, Gilmore, G & Evans, NW 2005, 'The chemical evolution of subpopulations in the Carina dwarf spheroidal', Proceedings of the International Astronomical Union, vol. 1, no. C198, pp. 134-138. https://doi.org/10.1017/S1743921305003637

APA

Koch, A., Wilkinson, M., Grebel, E. K., Harbeck, D., Kleyna, J., Wyse, R. F. G., Gilmore, G., & Evans, N. W. (2005). The chemical evolution of subpopulations in the Carina dwarf spheroidal. Proceedings of the International Astronomical Union, 1(C198), 134-138. https://doi.org/10.1017/S1743921305003637

Vancouver

Koch A, Wilkinson M, Grebel EK, Harbeck D, Kleyna J, Wyse RFG et al. The chemical evolution of subpopulations in the Carina dwarf spheroidal. Proceedings of the International Astronomical Union. 2005;1(C198):134-138. doi: 10.1017/S1743921305003637

Author

Koch, Andreas ; Wilkinson, M. ; Grebel, E. K. et al. / The chemical evolution of subpopulations in the Carina dwarf spheroidal. In: Proceedings of the International Astronomical Union. 2005 ; Vol. 1, No. C198. pp. 134-138.

Bibtex

@article{a503380b3feb4d7ca53034c9db19f0ca,
title = "The chemical evolution of subpopulations in the Carina dwarf spheroidal",
abstract = "We present the observed metallicity distribution for 437 red giants in the Carina dwarf spheroidal (dSph) galaxy that was derived from FLAMES medium-resolution spectroscopy of the near-infrared Ca triplet (CaT). We find a mean [Fe/H] of −1.7, dex and a full spread in metallicities of at least one dex. Most of this width is due to the occurrence of three populations at different [Fe/H], which are likely to be related to the three star forming (SF) episodes that governed Carina's evolution and also correlate with peaks in the age-distribution. Both the lack of any correlation between stellar colour and metallicity and a comparison of the metallicities with chemical evolution models, which suggest a major role of infalling gas, contribute to the detailed understanding of Carina's evolutionary history. Moreover, we find a mild dependence of metallicity on radial location, reflected in a shift of the distribution's peak towards the metal poor end in the outer regions.",
author = "Andreas Koch and M. Wilkinson and Grebel, {E. K.} and Daniel Harbeck and Jan Kleyna and Wyse, {Rosemary F. G.} and G. Gilmore and Evans, {N. W.}",
year = "2005",
doi = "10.1017/S1743921305003637",
language = "English",
volume = "1",
pages = "134--138",
journal = "Proceedings of the International Astronomical Union",
issn = "1743-9213",
publisher = "Cambridge University Press",
number = "C198",

}

RIS

TY - JOUR

T1 - The chemical evolution of subpopulations in the Carina dwarf spheroidal

AU - Koch, Andreas

AU - Wilkinson, M.

AU - Grebel, E. K.

AU - Harbeck, Daniel

AU - Kleyna, Jan

AU - Wyse, Rosemary F. G.

AU - Gilmore, G.

AU - Evans, N. W.

PY - 2005

Y1 - 2005

N2 - We present the observed metallicity distribution for 437 red giants in the Carina dwarf spheroidal (dSph) galaxy that was derived from FLAMES medium-resolution spectroscopy of the near-infrared Ca triplet (CaT). We find a mean [Fe/H] of −1.7, dex and a full spread in metallicities of at least one dex. Most of this width is due to the occurrence of three populations at different [Fe/H], which are likely to be related to the three star forming (SF) episodes that governed Carina's evolution and also correlate with peaks in the age-distribution. Both the lack of any correlation between stellar colour and metallicity and a comparison of the metallicities with chemical evolution models, which suggest a major role of infalling gas, contribute to the detailed understanding of Carina's evolutionary history. Moreover, we find a mild dependence of metallicity on radial location, reflected in a shift of the distribution's peak towards the metal poor end in the outer regions.

AB - We present the observed metallicity distribution for 437 red giants in the Carina dwarf spheroidal (dSph) galaxy that was derived from FLAMES medium-resolution spectroscopy of the near-infrared Ca triplet (CaT). We find a mean [Fe/H] of −1.7, dex and a full spread in metallicities of at least one dex. Most of this width is due to the occurrence of three populations at different [Fe/H], which are likely to be related to the three star forming (SF) episodes that governed Carina's evolution and also correlate with peaks in the age-distribution. Both the lack of any correlation between stellar colour and metallicity and a comparison of the metallicities with chemical evolution models, which suggest a major role of infalling gas, contribute to the detailed understanding of Carina's evolutionary history. Moreover, we find a mild dependence of metallicity on radial location, reflected in a shift of the distribution's peak towards the metal poor end in the outer regions.

U2 - 10.1017/S1743921305003637

DO - 10.1017/S1743921305003637

M3 - Journal article

VL - 1

SP - 134

EP - 138

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

SN - 1743-9213

IS - C198

ER -