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The Initial mass function of the first stars inferred from extremely metal-poor stars
(2018-04-11)
We compare the elemental abundance patterns of ~200 extremely metal-poor (EMP; [Fe/H] < −3) stars to the supernova yields of metal-free stars, in order to obtain insights into the characteristic masses of the first (Population ...
A formation timescale of the Galactic halo from Mg isotopes in dwarf stars
(2018-04-04)
We determine magnesium isotopic abundances of metal-poor dwarf stars from the galactic halo, to shed light on the onset of asymptotic giant branch (AGB) star nucleosynthesis in the galactic halo and constrain the timescale ...
The absence of an environmental dependence in the mass-metallicity relation at z = 2
(2015-04-02)
We investigate the environmental dependence of the mass-metallicity relation at z = 2 with MOSFIRE/Keck as part of the ZFIRE survey. Here, we present the chemical abundance of a Virgo-like progenitor at z = 2.095 that has ...