Current constraints on the cosmic growth history

By R. Bean, M. Tangmatitham. 2010

157 citations recorded by the source corpus.

We present constraints on the cosmic growth history with recent cosmological data, allowing for deviations from $\ensuremath{\Lambda}\mathrm{CDM}$ as might arise if cosmic acceleration is due to modifications to general relativity or inhomogeneous dark energy. We combine measures of the cosmic expansion history, from Type 1a supernovae, baryon acoustic oscillations, and the cosmic microwave background (CMB), with constraints on the growth of structure from recent galaxy, CMB, and weak lensing surveys along with integated Sachs Wolfe-galaxy cross correlations. Deviations from $\ensuremath{\Lambda}\mathrm{CDM}$ are parameterized by phenomenological modifications to the Poisson equation and the relationship between the two Newtonian potentials. We find modifications that are present at the time the CMB is formed are tightly constrained through their impact on the well-measured CMB acoustic peaks. By contrast, constraints on late-time modifications to the growth history, as might arise if modifications are related to the onset of cosmic acceleration, are far weaker, but remain consistent with $\ensuremath{\Lambda}\mathrm{CDM}$ at the 95% confidence level. For these late-time modifications we find that differences in the evolution on large and small scales could provide an interesting signature by which to search for modified growth histories with future wide angular coverage, large scale structure surveys.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4e160e8a11def99279d62e158a9213bdc26195b0

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Citations in the corpus

Structure formation in f(T) gravity and a solution for H0 tension (2018, background): “27) is a standard parametrization for modified theories of gravity [65, 66] and this result here records a modification in the context of modified teleparallel gravity.”
CFHTLenS: testing the laws of gravity with tomographic weak lensing and redshift-space distortions (2012, methodology): “When conducting cosmological tests of gravity, in this work and in others (Daniel et al. 2010; Bean & Tangmatitham 2010; Zhao et al. 2010; Song et al. 2011; Reyes et al. 2010; Tereno et al. 2011; Zuntz et al. 2012; Zhao et al. 2012; Rapetti et al. 2012), we necessarily make certain assumptions such…”
Modified Gravity and Cosmology (2011, methodology): “This parametrisation is incredibly useful for quantifying deviations from General Relativity, and a number of authors have used it in their analyses of cosmological data [148, 237, 630, 627, 41, 360, 361, 123, 1302].”
The 6dF Galaxy Survey: z \approx 0 measurement of the growth rate and sigma_8 (2012, background): “…like to stress that the γ-parameterisation of modified gravity has its limitations and other more general parameterisations have been proposed (see e.g. Silvestri & Trodden 2009; Bean & Tangmatitham 2010; Daniel & Linder 2010; Clifton et al. 2011; Hojjati, Pogosian & Zhao 2011; Baker et al. 2011).”
Cosmological tests of modified gravity (2015, background): “There are many attempts to put constraints on μ and Σ (or η) [222, 223, 224, 225, 226, 227, 228, 229].”
KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering (2017, background): “…G is Newton’s gravitational constant, ρ i is the density of species i, with a fractional overdensity δi, and Q(k, a) provides nonstandard modifications of the Poisson equation in scale and time, such that Q ≡ 1 in GR (e.g. Jain & Zhang 2008; Bean & Tangmatitham 2010; Dossett et al. 2015).”
Effective field theory of dark energy: A review (2019, methodology): “A systematic investigation of possible DE/MG extensions to GR can be performed using the μ,Σ, η phenomenological approach [150, 151, 152, 153] reviewed in Section 3.”
Observational probes of cosmic acceleration (2012, background): “…on GR-deviations described by the G9 and ∆γ parameters that characterize structure growth (§2.2), but an alternative approach parametrizes the ratios of Ψ and Φ to their GR-predicted values (see Koivisto and Mota 2006; Bean and Tangmatitham 2010; Daniel and Linder 2010, and references therein).”
The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology (2014, unknown): “…al. (2010); Fu et al. (2009); Hearin and Zentner (2009); Ishak and Dossett (2009); Song and Doré (2009); Thomas et al. (2009); Zhao et al. (2009); Bean and Tangmatitham (2010); Daniel et al. (2010); Jain and Khoury (2010); Tereno et al. (2011); Dossett et al. (2011); Thomas et al. (2011); Asaba…”
Cosmology and Fundamental Physics with the Euclid Satellite (2012, methodology): “This parameterization has been widely employed (Bertschinger and Zukin 2008; Daniel and Linder 2010; Linder and Cahn 2007; Bean and Tangmatitham 2010; Pogosian et al. 2010; Zhao et al. 2010; Dossett et al. 2011; Hojjati et al. 2011, 2012).”
KiDS-450: testing extensions to the standard cosmological model (2016, background): “…in the conformal Newtonian gauge, ρ i is the density of species i, G is Newton’s gravitational constant and Q(k, a) encodes the time and scale-dependent modifications to the Poisson equation (e.g. Jain & Zhang 2008; Bean & Tangmatitham 2010; Dossett et al. 2015, also see Ma & Bertschinger 1995).”
Dark energy or modified gravity? An effective field theory approach (2012, methodology): “In order to compare observational data with modification to general relativity, Bean and Tangmatitham [38] introduced two phenomenological functions Q and R which perturbed the Poisson equation and anisotropic shear stress.”