Probing the high-z IGM with the hyperfine transition of ${}^3$He${}^{+}$

Shivan Khullar, Qingbo Ma, Philipp Busch +3

The hyperfine transition of ${}^3$He${}^{+}$ at 3.5cm has been thought as a probe of the high-z IGM since it offers a unique insight into the evolution of the helium component of the gas…