2003/06/30 by Bhuvnesh Jain, Andy Taylor, Ivan Feller · 12 citations
Physics and Astronomy · Social Sciences · #Adaptive optics and wavefront sensing #Art #Astronomy #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark energy #French Language Learning Methods #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational lensing formalism #Humanities #Omega #Physics #Political science #Quantum mechanics #Redshift #Sigma #Sky #Sociology #Weak gravitational lensing #astro-ph
paper · pdf · doi:10.1103/physrevlett.91.141302
published as Phys.Rev.Lett.91:141302,2003 · 5 pages, 2 figures, submitted to PRL. Error in shear signal corrected - parameter constraints about a factor of 2 worse
arxiv created 2003/12/15 · openalex publication_date 2008/06/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/02
A cross-correlation technique of lensing tomography is developed to probe dark energy in the Universe. The variation of weak shear with redshift around foreground galaxies depends only on the angular distances and is robust to the dominant systematic error in lensing. We estimate the margin-alized accuracies that deep lensing surveys with photometric redshifts can provide on the dark energy density Omega(de), the equation of state parameter w, and its evolution w('): sigma(w) approximately equal 0.01f(-1/2)(sky) and sigma(w(')) approximately equal 0.03f(-1/2)(sky), where a prior of sigma(Omega(de))=0.03 is assumed in the marginalization.