Author

Alex S. Hill

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Review Open access Sep 2026

Detection of the Cosmological 21 cm Signal in Autocorrelation at z ∼ 1 with the Canadian Hydrogen Intensity Mapping Experiment

We present the first detection of the cosmological 21 cm intensity mapping signal in autocorrelation at z ∼ 1 with the Canadian Hydrogen Intensity Mapping Experiment (CHIME). Using 94 nights of observation, we have measured the 21 cm auto power spectrum over a frequency range of 608.2–707.8 MHz (z = 1.34–1.01) at 0.4 h...

M. Amiri, K. Bandura, Arnab Chakraborty et al. · Astrophysical Journal · 3 citations

Review Open access Aug 2026

The Origin of WHAM Point Source 46

The Wisconsin Hα Mapper surveyed the entire Galactic sky in Hα (∣vLSR∣ ≲ 100 km s−1) to approximately 0.1 Rayleigh (R), albeit with a 1° beam. Reynolds et al. (2005) reported “point sources” which stood out against the Galactic background in space and velocity. Half of the sources are associated with plausible planetar...

S. Kulkarni, Ze-Ren Lin, C. Beichman et al. · Publications of the Astronom... · 0 citations