2015/09/30 by Alkistis Pourtsidou, David Bacon, Robert Crittenden +2 · 2 citations
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Cluster analysis #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational lens #Intensity (physics) #Intensity mapping #Omega #Optics #Physics #Radio Astronomy Observations and Technology #Redshift #Statistics #Strong gravitational lensing #Weak gravitational lensing #astro-ph.CO
paper · pdf · doi:10.1093/mnras/stw658
9 pages, 8 figures, matches version accepted for publication in MNRAS
openalex publication_date 2016/03/18 · arxiv created 2016/04/15 · arxiv updated 2016/04/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We explore the potential of using intensity mapping surveys (MeerKAT, SKA) and optical galaxy surveys (DES, LSST) to detect H i clustering and weak gravitational lensing of 21 cm emission in auto- and cross-correlation. Our forecasts show that high-precision measurements of the clustering and lensing signals can be made in the near future using the intensity mapping technique. Such studies can be used to test the intensity mapping method, and constrain parameters such as the H i density |Ω _\rm H \small I|, the H i bias |b_\rm H \small I| and the galaxy-H i correlation coefficient |r_\rm H \small I-g|.