Constraining Brans-Dicke cosmology with the CSST galaxy clustering spectroscopic survey

Abstract

The Brans-Dicke (BD) theory is the simplest Scalar-Tensor theory of gravity, which can be considered as a candidate of modified Einstein's theory of general relativity. In this work, we forecast the constraints on BD theory in the CSST galaxy clustering spectroscopic survey with a magnitude limit $\sim 23$ AB mag for point-source 5$\sigma$ detection. We generate mock data based on the zCOSMOS catalog and consider the observational and instrumental effects of the CSST spectroscopic survey. We predicate galaxy power spectra in the BD theory from $z=0$ to 1.5, and the galaxy bias and other systematical parameters are also included. The Markov Chain Monte Carlo (MCMC) technique is employed to find the best-fits and probability distributions of the cosmological and systematical parameters. A Brans-Dicke parameter $\zeta$ is introduced, which satisfies $\zeta =\ln \left(1+\frac{1}{\omega }\right)$. We find that the CSST spectroscopic galaxy clustering survey can give $|\zeta |<10^{-2}$, or equivalently $|\omega |>\mathcal{O}(10^2)$ and $|\dot{G}/G|<10^{-13}$, under the assumption $\zeta =0$. These constraints are almost at the same order of magnitude compared to the joint constraints using the current cosmic microwave background (CMB), baryon acoustic oscillations (BAO), and Type Ia supernova (SN Ia) data, indicating that the CSST galaxy clustering spectroscopic survey would be powerful to constrain the BD theory and other modified gravity theories.

arXiv comment11 pages, 4 figures, 1 table. Accepted for publication in RAA

References in corpus (27)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• emcee: The MCMC Hammer
• The Sloan Digital Sky Survey: Technical Summary
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• The Confrontation between General Relativity and Experiment
• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• zCOSMOS: A Large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field
• The First Release COSMOS Optical and Near-IR Data and Catalog
• Redshift-Space Distortions, Pairwise Velocities and Nonlinearities
• Fingers of God
• Dark Energy vs. Modified Gravity
• Baryon Acoustic Oscillations in 2D: Modeling Redshift-space Power Spectrum from Perturbation Theory
• Weak Lensing and Cosmology
• Cosmology from the Chinese Space Station Optical Survey (CSS-OS)
• KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering
• Nonlinear Cosmological Power Spectra in Real and Redshift--Space
• PPN Parameter $\gamma$ and Solar System Constraints of Massive Brans-Dicke Theories
• Structure formation constraints on the Jordan-Brans-Dicke theory
• Cosmic microwave background with Brans-Dicke gravity II: constraints with the WMAP and SDSS data
• The 2-degree Field Lensing Survey: design and clustering measurements
• A large accretion disk of extreme eccentricity in the TDE ASASSN-14li
• Constraints on the Brans-Dicke gravity theory with the Planck data
• Forecasting the Dark Energy Measurement with Baryon Acoustic Oscillations: Prospects for the LAMOST surveys
• Cosmological constraint on Brans-Dicke Model
• Cosmic microwave background with Brans-Dicke Gravity: I. Covariant Formulation

Cited by in corpus (3)

• Synergy between CSST galaxy survey and gravitational-wave observation: Inferring the Hubble constant from dark standard sirens
• Future Cosmology: New Physics and Opportunity from the China Space Station Telescope (CSST)
• A New Approach to Flatness, Horizon and Late-time Accelerating Expansion Problems on the basis of Mach Principle