Magnesium Isotopes in Halo Stars

Details Magnesium Isotopes in Halo Stars Magnesium Isotopes in Halo Stars

2007-08-29

arxiv.org/abs/0708.3906v1

AIP Conf.Proc.990:181-183,2008

Astronomy and Astrophysics

Astrophysics

Proceedings, First Stars III, July 16-20, 2007, Santa Fe

Scientific paper

10.1063/1.2905536

We have determined Mg isotope ratios in halo field dwarfs and giants in the
globular cluster M71 based on high S/N high spectral resolution (R = 10$^5$)
Keck HIRES spectra. Unlike previous claims of an important contribution from
intermediate-mass AGB stars to the Galactic halo, we find that our
$^{26}$Mg/$^{24}$Mg ratios can be explained by massive stars.

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