• Corpus ID: 249375474

HI intensity mapping with MeerKAT: power spectrum detection in cross-correlation with WiggleZ galaxies

@inproceedings{Cunnington2022HIIM,
  title={HI intensity mapping with MeerKAT: power spectrum detection in cross-correlation with WiggleZ galaxies},
  author={Steven Cunnington and Yichao Li and M{\'a}rio G. Santos and Jingying Wang and Isabella P Carucci and Melis O. Irfan and Alkistis Pourtsidou and Marta Spinelli and Laura Wolz and Paula S Soares and Chris Blake and Philip Bull and Brandon Engelbrecht and Jos{\'e} Fonseca and K. J. B. Grainge and Yin-Zhe Ma},
  year={2022}
}
We present a detection of correlated clustering between MeerKAT radio intensity maps and galaxies from the WiggleZ Dark Energy Survey. We find a 7 . 7 𝜎 detection of the cross-correlation power spectrum, the amplitude of which is proportional to the product of the Hi density fraction ( Ω Hi ), Hi bias ( 𝑏 Hi ) and the cross-correlation coefficient ( 𝑟 ). We therefore obtain the constraint Ω Hi 𝑏 Hi 𝑟 = [ 0 . 86 ± 0 . 10 ( stat ) ± 0 . 12 ( sys )] × 10 − 3 , at an effective scale of 𝑘 eff ∼ 0… 
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