Testing gravity with CAMB and CosmoMC

Abstract

We introduce a patch to the commonly used public codes CAMB and CosmoMC that allows the user to implement a general modification of the equations describing the growth of cosmological perturbations, while preserving the covariant conservation of the energy-momentum. This patch replaces the previously publicly released code MGCAMB, while also extending it in several ways. The new version removes the limitation of late-time-only modifications to the perturbed Einstein equations, and includes several parametrization introduced in the literature. To demonstrate the use of the patch, we obtain joint constraints on the neutrino mass and parameters of a scalar-tensor gravity model from CMB, SNe and ISW data as measured from the correlation of CMB with large scale structure.

11 pages, 3 figures, 1 table; The new MGCAMB patch is available at http://www.sfu.ca/~aha25/MGCAMB.html

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Cited by in corpus (19)

• Effective Field Theory of Cosmic Acceleration: constraining dark energy with CMB data
• Testing General Relativity with 21 cm intensity mapping
• Constraining chameleon models with cosmology
• The phenomenological approach to modeling the dark energy
• Cosmology Based on f(R) Gravity Admits 1 eV Sterile Neutrinos
• EFTCAMB/EFTCosmoMC: massive neutrinos in dark cosmologies
• Constraints and tensions in testing general relativity from Planck and CFHTLenS including intrinsic alignment systematics
• Practical solutions for perturbed f(R) gravity
• Probing gravity at large scales through CMB lensing
• Matter Power Spectra in Viable $f(R)$ Gravity Models with Massive Neutrinos
• On the current status of Modified Gravity
• Probing Modified Gravity Theories with ISW and CMB Lensing
• Probing $f(R)$ cosmology with sterile neutrinos via measurements of scale-dependent growth rate of structure
• Gravitational Waves: A Test for Modified Gravity
• Cosmology based on $f(R)$ gravity with $\mathcal{O}(1)$ eV sterile neutrino
• Constraining dark sector perturbations I: cosmic shear and CMB lensing
• Material models of dark energy
• Constraining dark sector perturbations II: ISW and CMB lensing tomography
• Weighing neutrinos in $f(R)$ gravity in light of BICEP2