TY - JOUR
T1 - First detection of cosmic structure in the 21-cm intensity field
AU - Pen, U.L.
AU - Staveley-Smith, Lister
AU - Peterson, J.
AU - Chang, T.C.
PY - 2009
Y1 - 2009
N2 - We present the first statistically significant detection of cosmic structure using broadly distributed hydrogen radio emission. This is accomplished using a cross-correlation with optical galaxies. Statistical noise levels of 20 μK are achieved, unprecedented in this frequency band. The signal is consistent with arising from the collective flux of known populations of galaxies. This lends support to the idea that large volumes of the Universe can be rapidly mapped without the need to resolve individual faint galaxies, enabling precise constraints to dark energy models. We discuss strategies for improved intensity mapping.
AB - We present the first statistically significant detection of cosmic structure using broadly distributed hydrogen radio emission. This is accomplished using a cross-correlation with optical galaxies. Statistical noise levels of 20 μK are achieved, unprecedented in this frequency band. The signal is consistent with arising from the collective flux of known populations of galaxies. This lends support to the idea that large volumes of the Universe can be rapidly mapped without the need to resolve individual faint galaxies, enabling precise constraints to dark energy models. We discuss strategies for improved intensity mapping.
U2 - 10.1111/j.1745-3933.2008.00581.x
DO - 10.1111/j.1745-3933.2008.00581.x
M3 - Article
SN - 1745-3933
VL - 394
SP - Pages L6-L10
JO - Monthly Notices of the Royal Astronomical Society Letters
JF - Monthly Notices of the Royal Astronomical Society Letters
IS - 1
ER -