activity
20192024
most citedA bound on the 12C/13C ratio in near-pristine gas with ESPRESSO

26 citations · 113 across the 10 of their papers we have counts for

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Showing 2022Show all

2 papers · 1 filter

astro-ph.CO2022

Primordial helium-3 redux: The helium isotope ratio of the Orion nebula

Ryan J. Cooke, Pasquier Noterdaeme, James W. Johnson +5

We report the first direct measurement of the helium isotope ratio, 3He/4He, outside of the Local Interstellar Cloud, as part of science verification observations with the upgraded…

astro-ph.GA2022★ 20 cited

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…