The first generations of stars

Elisabetta Caffau, A. J. Gallagher, P. Bonifacio, R. Cayrel, N. Christlieb, P. C. Clark, P. François, S. Glover, R. S. Klessen, A. Koch, H. G. Ludwig, L. Monaco, B. Plez, L. Sbordone, M. Spite, F. Spite, M. Steffen, S. Zaggia

Resultado de la investigación: Article

Resumen

Extremely metal-poor (EMP) stars are descendants of massive stars from the earliest stellar generations. Their chemical composition reflects the early phases of the Universe, which allows us to place constraints on the masses of these first-generation massive stars and also allows us to better understand the formation of low-mass stars from a gas cloud depleted in metals. EMP stars are a minor component of the stellar population (about a thousandth) and special care has to be invested to find them. We exploited the Sloan Digital Sky Survey (SDSS) to search for EMP candidates with the colours of Turn-Off stars. We observed them at medium- and high-resolution with the ESO/VLT spectrographs X-Shooter and UVES to derive their chemical composition. We present the preliminary results on the metallicity distribution function, on the analysis of strontium, on the carbon enhanced stars, and on our effort to analyse molecular bands with 3D hydrodynamical models.

Idioma originalEnglish
Número de artículo053
PublicaciónProceedings of Science
Volumen07-11-July-2015
EstadoPublished - 2014

Huella dactilar

stars
massive stars
metals
chemical composition
European Southern Observatory
strontium
spectrographs
metallicity
universe
distribution functions
color
carbon
high resolution
gases

ASJC Scopus subject areas

  • General

Citar esto

Caffau, E., Gallagher, A. J., Bonifacio, P., Cayrel, R., Christlieb, N., Clark, P. C., ... Zaggia, S. (2014). The first generations of stars. Proceedings of Science, 07-11-July-2015, [053].
Caffau, Elisabetta ; Gallagher, A. J. ; Bonifacio, P. ; Cayrel, R. ; Christlieb, N. ; Clark, P. C. ; François, P. ; Glover, S. ; Klessen, R. S. ; Koch, A. ; Ludwig, H. G. ; Monaco, L. ; Plez, B. ; Sbordone, L. ; Spite, M. ; Spite, F. ; Steffen, M. ; Zaggia, S. / The first generations of stars. En: Proceedings of Science. 2014 ; Vol. 07-11-July-2015.
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abstract = "Extremely metal-poor (EMP) stars are descendants of massive stars from the earliest stellar generations. Their chemical composition reflects the early phases of the Universe, which allows us to place constraints on the masses of these first-generation massive stars and also allows us to better understand the formation of low-mass stars from a gas cloud depleted in metals. EMP stars are a minor component of the stellar population (about a thousandth) and special care has to be invested to find them. We exploited the Sloan Digital Sky Survey (SDSS) to search for EMP candidates with the colours of Turn-Off stars. We observed them at medium- and high-resolution with the ESO/VLT spectrographs X-Shooter and UVES to derive their chemical composition. We present the preliminary results on the metallicity distribution function, on the analysis of strontium, on the carbon enhanced stars, and on our effort to analyse molecular bands with 3D hydrodynamical models.",
author = "Elisabetta Caffau and Gallagher, {A. J.} and P. Bonifacio and R. Cayrel and N. Christlieb and Clark, {P. C.} and P. Fran{\cc}ois and S. Glover and Klessen, {R. S.} and A. Koch and Ludwig, {H. G.} and L. Monaco and B. Plez and L. Sbordone and M. Spite and F. Spite and M. Steffen and S. Zaggia",
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Caffau, E, Gallagher, AJ, Bonifacio, P, Cayrel, R, Christlieb, N, Clark, PC, François, P, Glover, S, Klessen, RS, Koch, A, Ludwig, HG, Monaco, L, Plez, B, Sbordone, L, Spite, M, Spite, F, Steffen, M & Zaggia, S 2014, 'The first generations of stars', Proceedings of Science, vol. 07-11-July-2015, 053.

The first generations of stars. / Caffau, Elisabetta; Gallagher, A. J.; Bonifacio, P.; Cayrel, R.; Christlieb, N.; Clark, P. C.; François, P.; Glover, S.; Klessen, R. S.; Koch, A.; Ludwig, H. G.; Monaco, L.; Plez, B.; Sbordone, L.; Spite, M.; Spite, F.; Steffen, M.; Zaggia, S.

En: Proceedings of Science, Vol. 07-11-July-2015, 053, 2014.

Resultado de la investigación: Article

TY - JOUR

T1 - The first generations of stars

AU - Caffau, Elisabetta

AU - Gallagher, A. J.

AU - Bonifacio, P.

AU - Cayrel, R.

AU - Christlieb, N.

AU - Clark, P. C.

AU - François, P.

AU - Glover, S.

AU - Klessen, R. S.

AU - Koch, A.

AU - Ludwig, H. G.

AU - Monaco, L.

AU - Plez, B.

AU - Sbordone, L.

AU - Spite, M.

AU - Spite, F.

AU - Steffen, M.

AU - Zaggia, S.

PY - 2014

Y1 - 2014

N2 - Extremely metal-poor (EMP) stars are descendants of massive stars from the earliest stellar generations. Their chemical composition reflects the early phases of the Universe, which allows us to place constraints on the masses of these first-generation massive stars and also allows us to better understand the formation of low-mass stars from a gas cloud depleted in metals. EMP stars are a minor component of the stellar population (about a thousandth) and special care has to be invested to find them. We exploited the Sloan Digital Sky Survey (SDSS) to search for EMP candidates with the colours of Turn-Off stars. We observed them at medium- and high-resolution with the ESO/VLT spectrographs X-Shooter and UVES to derive their chemical composition. We present the preliminary results on the metallicity distribution function, on the analysis of strontium, on the carbon enhanced stars, and on our effort to analyse molecular bands with 3D hydrodynamical models.

AB - Extremely metal-poor (EMP) stars are descendants of massive stars from the earliest stellar generations. Their chemical composition reflects the early phases of the Universe, which allows us to place constraints on the masses of these first-generation massive stars and also allows us to better understand the formation of low-mass stars from a gas cloud depleted in metals. EMP stars are a minor component of the stellar population (about a thousandth) and special care has to be invested to find them. We exploited the Sloan Digital Sky Survey (SDSS) to search for EMP candidates with the colours of Turn-Off stars. We observed them at medium- and high-resolution with the ESO/VLT spectrographs X-Shooter and UVES to derive their chemical composition. We present the preliminary results on the metallicity distribution function, on the analysis of strontium, on the carbon enhanced stars, and on our effort to analyse molecular bands with 3D hydrodynamical models.

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VL - 07-11-July-2015

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M1 - 053

ER -

Caffau E, Gallagher AJ, Bonifacio P, Cayrel R, Christlieb N, Clark PC y otros. The first generations of stars. Proceedings of Science. 2014;07-11-July-2015. 053.