2015/02/04 by Eric V. Linder · 7 citations
Mathematics · Physics and Astronomy · #Artificial intelligence #Astronomy and Astrophysical Research #Astrophysics #Complementarity (molecular biology) #Computer science #Constraint (computer-aided design) #Cosmology #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geometry #Lens (geology) #Leverage (statistics) #Mathematics #Optics #Physics #Redshift #Statistical physics #Stellar, planetary, and galactic studies #Systematics #Weak gravitational lensing #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.91.083511
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 91(8) (American Physical Society) · 9 pages, 7 figures
arxiv created 2015/02/04 · openalex publication_date 2015/04/07 · arxiv updated 2015/04/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Strong lensing time delay cosmography has excellent complementarity with other dark energy probes and will soon have abundant systems detected. We investigate two issues in the imaging and spectroscopic follow-up required to obtain the time delay distance. The first is optimization of spectroscopic resources. We develop a code to optimize the cosmological leverage under the constraint of constant spectroscopic time and find that sculpting the lens system redshift distribution can deliver a 40% improvement in dark energy figure of merit. The second is the role of systematics, correlated between different quantities of a given system or model errors common to all systems. We show how the levels of different systematics affect the cosmological parameter estimation and derive guidance for the fraction of double image vs quad image systems to follow as a function of differing systematics between them.