20 citations · 20 across the 1 of their papers we have counts for
5 papers
Oxygen-enhanced extremely metal-poor DLAs: A signpost of the first stars?
Louise Welsh, Ryan Cooke, Michele Fumagalli +1
We present precise abundance determinations of two near-pristine damped Ly systems (DLAs) to assess the nature of the [O/Fe] ratio at [Fe/H] < -3 (i.e. <1/1000 of the solar meta…
The stochastic enrichment of Population II stars
Louise Welsh, Ryan Cooke, Michele Fumagalli
We investigate the intrinsic scatter in the chemical abundances of a sample of metal-poor ([Fe/H]<-2.5) Milky Way halo stars. We draw our sample from four historic surveys and focu…
A limit on Planck-scale froth with ESPRESSO
Ryan Cooke, Louise Welsh, Michele Fumagalli +1
Some models of quantum gravity predict that the very structure of spacetime is `frothy' due to quantum fluctuations. Although the effect is expected to be tiny, if these spacetime…
A bound on the 12C/13C ratio in near-pristine gas with ESPRESSO
Louise Welsh, Ryan Cooke, Michele Fumagalli +1
Using science verification observations obtained with ESPRESSO at the Very Large Telescope (VLT) in 4UT mode, we report the first bound on the carbon isotope ratio 12C/13C of a qui…
Modelling the chemical enrichment of Population III supernovae: The origin of the metals in near-pristine gas clouds
Louise Welsh, Ryan Cooke, Michele Fumagalli
The most metal-poor, high redshift damped Lyman-alpha systems (DLAs) provide a window to study some of the first few generations of stars. In this paper, we present a novel model t…