Ryan J. Cooke
2 papers · Latest:
Galaxies & Cosmology
Detection of an Extended Ly$α$ Halo around a $\textit{z}=6.64$ Broad Absorption Line Quasar with the Keck Cosmic Web Imager
An extended Lyα halo was detected around a z=6.64 quasar using KCWI, showing distinct kinematics and gravitationally dominated motion.
2605.05673
Towards a measurement of the primordial helium isotope ratio
Measured primordial helium isotope ratio using He I* absorbers, confirming Big Bang predictions and refining stellar yield estimates.
2605.00122
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