Integrated Sachs-Wolfe effect in massive bigravity

  title={Integrated Sachs-Wolfe effect in massive bigravity},
  author={Jonas Enander and Yashar Akrami and Edvard Mortsell and Malin Renneby and Adam R. Solomon},
  journal={Physical Review D},
We study the Integrated Sachs-Wolfe (ISW) effect in ghost-free, massive bigravity, where only one metric couples to matter. We focus on the infinite-branch bigravity (IBB) model which exhibits viab ... 

Figures from this paper

New massive bigravity cosmologies with double matter coupling

We study a previously largely unexplored branch of homogeneous and isotropic background solutions in ghost-free massive bigravity with consistent double matter coupling. For a certain family of

Mild bounds on bigravity from primordial gravitational waves

If the amplitude of primordial gravitational waves is measured in the near-future, what could it tell us about bigravity? To address this question, we study massive bigravity theories by focusing on

Tensor Modes in Bigravity: Primordial to Present

uctuations in the theory, only one of which couples to matter. We study perturbations about two classes of cosmological solutions in bigravity, computing the tensor contribution to the temperature

Gravity at the horizon: on relativistic effects, CMB-LSS correlations and ultra-large scales in Horndeski's theory

We address the impact of consistent modifications of gravity on the largest observable scales, focusing on relativistic effects in galaxy number counts and the cross-correlation between the matter

Cosmological viability of massive gravity with generalized matter coupling

There is a no-go theorem forbidding flat and closed FLRW solutions in massive gravity on a flat reference metric, while open solutions are unstable. Recently it was shown that this no-go theorem can

Surfing gravitational waves: can bigravity survive growing tensor modes?

The theory of bigravity offers one of the simplest possibilities to describe a massive graviton while having self-accelerating cosmological solutions without a cosmological constant. However, it has

Cosmic variance mitigation in measurements of the integrated Sachs-Wolfe effect

The cosmic microwave background (CMB) is sensitive to the recent phase of accelerated cosmic expansion through the late-time integrated Sachs-Wolfe (ISW) effect, which manifests as secondary

ou rnal of Cosmology and Astroparticle Physics

We analyze the theories of gravity modied by a generic nonderivative potential built from the metric, under the minimal requirement of unbroken spatial rotations. Using the canonical analysis, we

Dipolar dark matter with massive bigravity

Massive gravity theories have been developed as viable IR modifications of gravity motivated by dark energy and the problem of the cosmological constant. On the other hand, modified gravity and



I and i

There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.

and D

  • N. Spergel,
  • 2014

and M

  • Wyman, Phys.Rev. D86, 061504
  • 2012

JHEP 1204

  • 123
  • 2012

JHEP 1202

  • 126
  • 2012

JHEP 1107

  • 009
  • 2011

JCAP 1403

  • 029
  • 2014

and N

  • Bahcall, Phys.Rev. D78, 043519
  • 2008

JHEP 1310

  • 031
  • 2013

JHEP 1201

  • 035
  • 2012