2006/08/23 by Miguel F. Morales, M. F. Morales · 1 citation
Engineering · Physics and Astronomy · #Artificial intelligence #Astrophysics #Computer science #Electronic engineering #Engineering #Galaxies: Formation, Evolution, Phenomena #Galaxy #Image (mathematics) #Noise (video) #Physics #Pulsars and Gravitational Waves Research #Radio Astronomy Observations and Technology #Redshift #Sensitivity (control systems) #Weak gravitational lensing #astro-ph
paper · pdf · doi:10.1086/508614
published as Astrophys.J.650:L21-L24,2006 · Accepted for publication in ApJL, 4 pages, 1 figure
arxiv created 2006/08/23 · openalex publication_date 2006/09/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Weak-lensing surveys have become a powerful tool for mapping mass distributions and constraining the expansion history of our universe, but continuum surveys must average over a large number of galaxies to average down the ellipticity noise due to the unknown ellipticity and orientation of the lensed galaxies. This Letter presents a technique for measuring weak lensing with velocity maps that avoids the ellipticity noise. By studying the inherent noise characteristics, we argue this new technique could rival or exceed the sensitivity of traditional continuum observations for upcoming H I radio surveys.