TY - JOUR
T1 - HI and cosmological constraints from intensity mapping, optical, and CMB surveys
AU - Pourtsidou, Alkistis
AU - Bacon, David
AU - Crittenden, Robert
N1 - 11 pages, 6 tables, 3 figures; improved noise modelling for the intensity mapping survey with MeerKAT, added Figure 2, extended discussions, added references;
PY - 2017/10
Y1 - 2017/10
N2 - We forecast constraints on neutral hydrogen (HI) and cosmological parameters using near-term intensity mapping surveys with instruments such as BINGO, MeerKAT, and the SKA, and Stage III and IV optical galaxy surveys. If foregrounds and systematic effects can be controlled - a problem which becomes much easier in cross-correlation - these surveys will provide exquisite measurements of the HI density and bias, as well as measurements of the growth of structure, the angular diameter distance, and the Hubble rate, over a wide range of redshift. We also investigate the possibility of detecting the late time ISW effect using the Planck satellite and forthcoming intensity mapping surveys, finding that a large sky survey with Phase 1 of the SKA can achieve a near optimal detection.
AB - We forecast constraints on neutral hydrogen (HI) and cosmological parameters using near-term intensity mapping surveys with instruments such as BINGO, MeerKAT, and the SKA, and Stage III and IV optical galaxy surveys. If foregrounds and systematic effects can be controlled - a problem which becomes much easier in cross-correlation - these surveys will provide exquisite measurements of the HI density and bias, as well as measurements of the growth of structure, the angular diameter distance, and the Hubble rate, over a wide range of redshift. We also investigate the possibility of detecting the late time ISW effect using the Planck satellite and forthcoming intensity mapping surveys, finding that a large sky survey with Phase 1 of the SKA can achieve a near optimal detection.
KW - astro-ph.CO
U2 - 10.1093/mnras/stx1479
DO - 10.1093/mnras/stx1479
M3 - Article
SN - 0035-8711
VL - 470
SP - 4251
EP - 4260
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -