Abstract
The feasibility of a large-scale survey via the 21cm emission from neutral hydrogen utilising the Chinese Five-hundred metre Aperture Spherical Telescope (FAST) is investigated. It is found to be a powerful instrument, with an estimated 107 galaxies found in around 2 years with an average redshift of 0.15 if a focal plane array is employed with 100 independent beams. FAST also lends itself well to constraining cosmological parameters such as Γ and ns; 5% and 7% respectively independent of CMB measurements. When combined with simulated PLANCK data one can expect w to be constrained to within 5% of -1. FAST compares favourably with the pathfinder missions for the Square Kilometer Aray (SKA), finding only a factor two less galaxies than the 10% SKA, but crucially probing the local universe, while the precursor SKA’s find galaxies with a higher mean redshift thereby being both competitive with and complimentary to the 10% SKA. The 1% SKA is expected to be far outclassed by FAST.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
