A More Accurate Parameterization based on cosmic Age (MAPAge)
arXiv:2108.03959 · doi:10.1088/1674-4527/21/11/277
Abstract
Recently, several statistically significant tensions between different cosmological datasets have raised doubts about the standard Lambda cold dark matter (CDM) model. A recent letter~\citet{Huang:2020mub} suggests to use "Parameterization based on cosmic Age" (PAge) to approximate a broad class of beyond-CDM models, with a typical accuracy in angular diameter distances at . In this work, we extend PAge to a More Accurate Parameterization based on cosmic Age (MAPAge) by adding a new degree of freedom . The parameter describes the difference between physically motivated models and their phenomenological PAge approximations. The accuracy of MAPAge, typically of order in angular diameter distances at , is significantly better than PAge. We compare PAge and MAPAge with current observational data and forecast data. The conjecture in~\citet{Huang:2020mub}, that PAge approximation is sufficiently good for current observations, is quantitatively confirmed in this work. We also show that the extension from PAge to MAPAge is important for future observations, which typically requires sub-percent accuracy in theoretical predictions.
arXiv comment7 pages, 3 figures
References in corpus (33)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Planck 2013 results. XVI. Cosmological parameters
- Cosmological Imprint of an Energy Component with General Equation of State
- 4D Gravity on a Brane in 5D Minkowski Space
- The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
- The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
- Quintessence, Cosmic Coincidence, and the Cosmological Constant
- The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
- An alternative to quintessence
- Exploring the Expansion History of the Universe
- Accelerating Universes with Scaling Dark Matter
- Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
- A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
- Coupled Quintessence
- The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
- Kinetically Driven Quintessence
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
- Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- H0LiCOW XIII. A 2.4% measurement of from lensed quasars: tension between early and late-Universe probes
- Cosmology and Fundamental Physics with the Euclid Satellite
- KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
- Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
- Jerk, snap, and the cosmological equation of state
- The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
- Cosmology from the Chinese Space Station Optical Survey (CSS-OS)
- Gaussian Process Cosmography
- Baryon acoustic oscillations from the complete SDSS-III Ly-quasar cross-correlation function at
- Observational effects of a running Planck mass
- Reaffirming the Cosmic Acceleration without Supernova and CMB
- Supernova Magnitude Evolution and PAge Approximation
- The dimensionless age of the Universe: a riddle for our time
- Reconciling low and high redshift GRB luminosity correlations