TY - UNPB
T1 - HI intensity mapping with MeerKAT power spectrum detection in cross-correlation with WiggleZ galaxies
AU - Cunnington, Steven
AU - Li, Yichao
AU - Santos, Mario G.
AU - Wang, Jingying
AU - Carucci, Isabella P.
AU - Irfan, Melis O.
AU - Pourtsidou, Alkistis
AU - Spinelli, Marta
AU - Wolz, Laura
AU - Soares, Paula S.
AU - Blake, Chris
AU - Bull, Philip
AU - Engelbrecht, Brandon
AU - Fonseca, José
AU - Grainge, Keith
AU - Ma, Yin-Zhe
N1 - 11 pages, 7 figures. See Fig.5 for the main result, showing the cross-power spectrum between MeerKAT and WiggleZ, revealing the 7.7\sigma detection. v2 is the version accepted for publication by MNRAS. The main changes from v1 were in introducing the radio intensity mapping data
PY - 2022/6/3
Y1 - 2022/6/3
N2 - We present a detection of correlated clustering between MeerKAT radio intensity maps and galaxies from the WiggleZ Dark Energy Survey. We find a $7.7\sigma$ detection of the cross-correlation power spectrum, the amplitude of which is proportional to the product of the HI density fraction ($\Omega_{\rm HI}$), HI bias ($b_{\rm HI}$) and the cross-correlation coefficient ($r$). We therefore obtain the constraint $\Omega_{\rm HI} b_{\rm HI} r\,{=}\,[0.86\,{\pm}\,0.10\,({\rm stat})\,{\pm}\,0.12\,({\rm sys})]\,{\times}\,10^{-3}$, at an effective scale of $k_{\rm eff}\,{\sim}\,0.13\,h\,{\rm Mpc}^{-1}$. The intensity maps were obtained from a pilot survey with the MeerKAT telescope, a 64-dish pathfinder array to the SKA Observatory (SKAO). The data were collected from 10.5 hours of observations using MeerKAT's L-band receivers over six nights covering the 11hr field of WiggleZ, in the frequency range $1015-973\,{\rm MHz}$ (0.400$\,{
AB - We present a detection of correlated clustering between MeerKAT radio intensity maps and galaxies from the WiggleZ Dark Energy Survey. We find a $7.7\sigma$ detection of the cross-correlation power spectrum, the amplitude of which is proportional to the product of the HI density fraction ($\Omega_{\rm HI}$), HI bias ($b_{\rm HI}$) and the cross-correlation coefficient ($r$). We therefore obtain the constraint $\Omega_{\rm HI} b_{\rm HI} r\,{=}\,[0.86\,{\pm}\,0.10\,({\rm stat})\,{\pm}\,0.12\,({\rm sys})]\,{\times}\,10^{-3}$, at an effective scale of $k_{\rm eff}\,{\sim}\,0.13\,h\,{\rm Mpc}^{-1}$. The intensity maps were obtained from a pilot survey with the MeerKAT telescope, a 64-dish pathfinder array to the SKA Observatory (SKAO). The data were collected from 10.5 hours of observations using MeerKAT's L-band receivers over six nights covering the 11hr field of WiggleZ, in the frequency range $1015-973\,{\rm MHz}$ (0.400$\,{
KW - astro-ph.CO
U2 - 10.1093/mnras/stac3060
DO - 10.1093/mnras/stac3060
M3 - Preprint
BT - HI intensity mapping with MeerKAT power spectrum detection in cross-correlation with WiggleZ galaxies
ER -