Abundances in the Galactic Bulge: Evidence for fast chemical enrichment

M. Zoccali, A. Lecureur, B. Barbuy, V. Hill, A. Renzini, D. Minniti, Y. Momany, A. Gómez, S. Ortolani

Resultado de la investigación: Article

Resumen

We spectroscopically characterize the Galactic Bulge to infer its star formation timescale, compared to the other Galactic components, through the chemical signature on its individual stars. O, Na, Mg, Al were obtained for 50 K giants in four fields towards the Galactic bulge from UVES spectra (R=45,000), while Fe was measured in more than 400 stars with a slightly low resolution (R=20,000) and the GIRAFFE spectrograph at VLT. Oxygen and Magnesium show a well defined trend with [Fe/H], with abundances larger than those measured in both thin and thick disk stars, supporting a scenario in which the bulge formed before and more rapidly than the disk. On the other hand the iron distribution peaks at solar metallicity and it is slightly narrower than that measured in previous works. Part of the present results have been published by Zoccali et al. (2006) and Lecureur et al. (2006), and part will be discussed in forthcoming papers.

Idioma originalEnglish
Páginas (desde-hasta)73-77
Número de páginas5
PublicaciónProceedings of the International Astronomical Union
Volumen2
N.ºS241
DOI
EstadoPublished - dic 2006

Huella dactilar

galactic bulge
magnesium
timescale
iron
stars
oxygen
spectrographs
metallicity
star formation
signatures
trends
distribution
chemical
trend

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Citar esto

Zoccali, M. ; Lecureur, A. ; Barbuy, B. ; Hill, V. ; Renzini, A. ; Minniti, D. ; Momany, Y. ; Gómez, A. ; Ortolani, S. / Abundances in the Galactic Bulge : Evidence for fast chemical enrichment. En: Proceedings of the International Astronomical Union. 2006 ; Vol. 2, N.º S241. pp. 73-77.
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Zoccali, M, Lecureur, A, Barbuy, B, Hill, V, Renzini, A, Minniti, D, Momany, Y, Gómez, A & Ortolani, S 2006, 'Abundances in the Galactic Bulge: Evidence for fast chemical enrichment', Proceedings of the International Astronomical Union, vol. 2, n.º S241, pp. 73-77. https://doi.org/10.1017/S1743921307004723

Abundances in the Galactic Bulge : Evidence for fast chemical enrichment. / Zoccali, M.; Lecureur, A.; Barbuy, B.; Hill, V.; Renzini, A.; Minniti, D.; Momany, Y.; Gómez, A.; Ortolani, S.

En: Proceedings of the International Astronomical Union, Vol. 2, N.º S241, 12.2006, p. 73-77.

Resultado de la investigación: Article

TY - JOUR

T1 - Abundances in the Galactic Bulge

T2 - Evidence for fast chemical enrichment

AU - Zoccali, M.

AU - Lecureur, A.

AU - Barbuy, B.

AU - Hill, V.

AU - Renzini, A.

AU - Minniti, D.

AU - Momany, Y.

AU - Gómez, A.

AU - Ortolani, S.

PY - 2006/12

Y1 - 2006/12

N2 - We spectroscopically characterize the Galactic Bulge to infer its star formation timescale, compared to the other Galactic components, through the chemical signature on its individual stars. O, Na, Mg, Al were obtained for 50 K giants in four fields towards the Galactic bulge from UVES spectra (R=45,000), while Fe was measured in more than 400 stars with a slightly low resolution (R=20,000) and the GIRAFFE spectrograph at VLT. Oxygen and Magnesium show a well defined trend with [Fe/H], with abundances larger than those measured in both thin and thick disk stars, supporting a scenario in which the bulge formed before and more rapidly than the disk. On the other hand the iron distribution peaks at solar metallicity and it is slightly narrower than that measured in previous works. Part of the present results have been published by Zoccali et al. (2006) and Lecureur et al. (2006), and part will be discussed in forthcoming papers.

AB - We spectroscopically characterize the Galactic Bulge to infer its star formation timescale, compared to the other Galactic components, through the chemical signature on its individual stars. O, Na, Mg, Al were obtained for 50 K giants in four fields towards the Galactic bulge from UVES spectra (R=45,000), while Fe was measured in more than 400 stars with a slightly low resolution (R=20,000) and the GIRAFFE spectrograph at VLT. Oxygen and Magnesium show a well defined trend with [Fe/H], with abundances larger than those measured in both thin and thick disk stars, supporting a scenario in which the bulge formed before and more rapidly than the disk. On the other hand the iron distribution peaks at solar metallicity and it is slightly narrower than that measured in previous works. Part of the present results have been published by Zoccali et al. (2006) and Lecureur et al. (2006), and part will be discussed in forthcoming papers.

KW - Atmospheres

KW - Galaxy: bulge Stars: Abundances

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