The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES

Physics

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The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES. / Koch, Andreas; Grebel, E. K.; Wyse, Rosemary F. G. et al.
In: The Messenger, No. 123, 2006, p. 38-40.

Research output: Contribution to Journal/Magazine › Journal article

Harvard

Koch, A, Grebel, EK, Wyse, RFG, Kleyna, J, Wilkinson, MI, Harbeck, D, Gilmore, G & Evans, NW 2006, 'The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES', The Messenger, no. 123, pp. 38-40. <https://www.eso.org/sci/publications/messenger/archive/no.123-mar06/messenger-no123-38-40.pdf>

APA

Koch, A., Grebel, E. K., Wyse, R. F. G., Kleyna, J., Wilkinson, M. I., Harbeck, D., Gilmore, G., & Evans, N. W. (2006). The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES. The Messenger, (123), 38-40. https://www.eso.org/sci/publications/messenger/archive/no.123-mar06/messenger-no123-38-40.pdf

Vancouver

Koch A, Grebel EK, Wyse RFG, Kleyna J, Wilkinson MI, Harbeck D et al. The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES. The Messenger. 2006;(123):38-40.

Author

Koch, Andreas ; Grebel, E. K. ; Wyse, Rosemary F. G. et al. / The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES. In: The Messenger. 2006 ; No. 123. pp. 38-40.

Bibtex

@article{91edc78b1d8a4359aee67ed721cac9de,

title = "The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES",

abstract = "The Carina dwarf spheroidal galaxy is the only one of this type to show clearly episodic star formation separated by long pauses. Still its Red Giant Branch is remarkably narrow. Our medium-resolution spectroscopy of 437 Red Giants in this galactic satellite with FLAMES reveals a full range of metallicities from ~ –3.0 up to ~ 0.0 dex. There also appears to be a mild radial gradient in that more metal-rich populations are more centrally concentrated, matching a similar trend in ages with an increasing fraction of intermediate-age stars in the centre (Harbeck et al. 2001). Complemented by the colours of the more metal-rich stars, this suggests that Carina exhibits an age-metallicity relation. We address the star formation in this intriguing galaxy by also pursuing its agemetallicity degeneracy, resulting in a narrow Red Giant Branch despite the considerable spread in metallicity and wide range of ages, and applying basic models of chemical evolution.",

author = "Andreas Koch and Grebel, {E. K.} and Wyse, {Rosemary F. G.} and Jan Kleyna and Wilkinson, {M. I.} and Daniel Harbeck and G. Gilmore and Evans, {N. W.}",

year = "2006",

language = "English",

pages = "38--40",

journal = "The Messenger",

issn = "0722-6691",

number = "123",

}

RIS

TY - JOUR

T1 - The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES

AU - Koch, Andreas

AU - Grebel, E. K.

AU - Wyse, Rosemary F. G.

AU - Kleyna, Jan

AU - Wilkinson, M. I.

AU - Harbeck, Daniel

AU - Gilmore, G.

AU - Evans, N. W.

PY - 2006

Y1 - 2006

N2 - The Carina dwarf spheroidal galaxy is the only one of this type to show clearly episodic star formation separated by long pauses. Still its Red Giant Branch is remarkably narrow. Our medium-resolution spectroscopy of 437 Red Giants in this galactic satellite with FLAMES reveals a full range of metallicities from ~ –3.0 up to ~ 0.0 dex. There also appears to be a mild radial gradient in that more metal-rich populations are more centrally concentrated, matching a similar trend in ages with an increasing fraction of intermediate-age stars in the centre (Harbeck et al. 2001). Complemented by the colours of the more metal-rich stars, this suggests that Carina exhibits an age-metallicity relation. We address the star formation in this intriguing galaxy by also pursuing its agemetallicity degeneracy, resulting in a narrow Red Giant Branch despite the considerable spread in metallicity and wide range of ages, and applying basic models of chemical evolution.

AB - The Carina dwarf spheroidal galaxy is the only one of this type to show clearly episodic star formation separated by long pauses. Still its Red Giant Branch is remarkably narrow. Our medium-resolution spectroscopy of 437 Red Giants in this galactic satellite with FLAMES reveals a full range of metallicities from ~ –3.0 up to ~ 0.0 dex. There also appears to be a mild radial gradient in that more metal-rich populations are more centrally concentrated, matching a similar trend in ages with an increasing fraction of intermediate-age stars in the centre (Harbeck et al. 2001). Complemented by the colours of the more metal-rich stars, this suggests that Carina exhibits an age-metallicity relation. We address the star formation in this intriguing galaxy by also pursuing its agemetallicity degeneracy, resulting in a narrow Red Giant Branch despite the considerable spread in metallicity and wide range of ages, and applying basic models of chemical evolution.

M3 - Journal article

SP - 38

EP - 40

JO - The Messenger

JF - The Messenger

SN - 0722-6691

IS - 123

ER -

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