Redshift drift cosmography for model-independent cosmological inference

2021/07/31 by Asta Heinesen · 22 citations
Mathematics · Physics and Astronomy · #Anisotropy #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Deceleration parameter #Friedmann–Lemaître–Robertson–Walker metric #Galaxies: Formation, Evolution, Phenomena #Galaxy #Isotropy #Metric (unit) #Physics #Quantum mechanics #Redshift #Redshift survey #Statistical and numerical algorithms #Statistical physics #Universe #astro-ph.CO #gr-qc

paper · pdf · doi:10.1103/physrevd.104.123527

published in Physical review. D/Physical review. D. 104(12) (American Physical Society) · 10 pages, matches published version

openalex publication_date 2021/12/10 · arxiv created 2021/12/12 · arxiv updated 2021/12/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We develop a cosmographic framework for analyzing redshift drift signals of nearby sources model independently, i.e., without making assumptions about the metric description of the Universe. We show that the Friedmann-Lema\^\itre-Robertson-Walker (FLRW) prediction is altered nontrivially by regional anisotropies and inhomogeneities. In particular, we find that the position drift of the sources is nontrivially linked to the redshift drift signal. The redshift drift signal for nearby sources might be formulated in terms of an effective deceleration parameter, which reduces to the FLRW deceleration parameter in the homogeneous and isotropic limit. The presented cosmographic framework can be used for model-independent data analysis, exploiting the fact that the exact anisotropic redshift drift signal at lowest order in redshift is given by a finite set of physically interpretable coefficients. We discuss physical limits of interest as well as challenges related to the framework.

Citations

• Direct Measurement of Cosmological Parameters from the Cosmic Deceleration of Extragalactic Objects
• Distinguishing between void models and dark energy with cosmic parallax and redshift drift
• Light propagation in a homogeneous and anisotropic universe
• Quasi-Newtonian dust cosmologies
• Adhesive gravitational clustering
• On the Newtonian limit of the Weyl tensor
• Giving Cosmic Redshift Drift a Whirl
• Time Drift of Cosmological Redshifts as a Test of the Copernican Principle
• A relation between distance and radial velocity among extra-galactic nebulae
• Ideal observational cosmology
• Cosmological perturbations and the physical meaning of gauge-invariant variables
• A class of homogeneous cosmological models
• Cosmic dynamics in the era of Extremely Large Telescopes
• The time evolution of cosmological redshift as a test of dark energy
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• Direct detection of the cosmic expansion: the redshift drift and the flux drift
• The effect of our local motion on the Sandage–Loeb test of the cosmic expansion
• Gaia Early Data Release 3: Acceleration of the solar system from Gaia astrometry
• In the Realm of the Hubble tension - a Review of Solutions